.....

आकार लागेका शब्दहरु: १.  मामा २. काका ३. आमा ४. दादा ५. घार .....

soln, suppose 'x' be the present age of his son then, present age of father = 4x + 4 now, difference of their age = 28 or,   (4x + 4) - x = 28 or, 4x - x + 4 = 28 or,  3x = 28 -4 or, 3x = 24 or, x = 24/3 = 8 hence,  .....

soln, suppose, l =  'x' be the length of rectangle then, breadth of rectangle, b = 3l/4= 3x/4 given, perimeter of rectangle,  p = 560cm or,  2(l + b) =560 or, 2(x + 3x / 4) = 560 or, 2(4x+3x/4) = 560 or, 2(7x/4) = 560 or, .....

We need to brush teeth to remove stuck food and plaque and toprotect from cavities and harm full .....

We have two .....

19x/7 = 57 / 49 or, 19x = 57 *7 / 49 or, 19x = 57/7 or, x = 57/ 7 * 19 or, x = 57 / 133= 3/7 hence,  x = .....

soln, 5x/12 - 3/8 = 1/2 or, (5x * 2 - 3 * 3) / 24 = 1/2 or, 10x - 9 = 1/2 * 24 or, 10x - 9 = 12 or, 10x = 12 + 9 or, 10x = 21 or, x = .....

4/9 * 1/24 = 1/9 * 1/6 = 1 / .....

LET, x% should 140 be decreased to get 84 now, 140 - 140 * x % = 84 or, 140 - 140 * x / 100 = 84 or, 140 - 14x/10 = 84 or, 1400-14x/10 = 84 or, 1400 -14x = 840 or, 1400 - 840 = 14x or, 560 = 14x or, 560/14 = x or, 40 % = x hence 40 % should be .....

Suppose, the first odd number = a To find the next odd, we add 2. So, the odd number after a = a + 2 Again the odd number after a + 2 = a + 2 + 2 = a + 4. Now, By the question, The sum of three consecutive odd numbers = 51 or, a + (a + 2) + .....

given,  12 is a smaller number suppose, x be a number , then, greater number is x + 12 according to question, (x + 12) - 12 = 18 or, x + 12 - 12 = 18 or, x = 18 hence, greater number is x + 12 = 18 + 12 = .....

soln, 2x + 1 = x + 3 or,  2x - x = 3 - 1 or, x = .....

solution, according to question, total diameter including the ground = 137 + 3 +3 = 143 m or radius of the ground (r) = 143/2 =71.5m Total area including the path = πr2=3.14×(71.5)2 = 16052.465 m2 Now  the area of only circular cricket .....

The animal without backbone are called .....

18÷{7+2(7-6)}+2 = 18÷{7+2 * 1 }+2 = 18÷{7+2  }+2 = 18÷ 9 +2 = 18÷ 9 +2 = 2 +2 = .....

Do you know?  The paper you are using for writing is made of trees,  From forest we get wood, fresh air , wildlife etc, The water resources of pure water is found inside the forest,  we all depend upon forest ,  so forest is one .....

External fertilization is the process in which the fusion of male and female gamete takes place outside the female body in an external medium, generally water. For example, fish, frog, starfish .....

As you have studied about electrical devices and bulb, you could have learned about Nicrome wire and tungsten wire,, lets look for difference between them   Nichrome wire is used in the elements of electric devices where as Tungsten .....

.....

.....

soln given  length (L)=80m perimeter of square =4L = 4x80=320m ∴perimeter of square = .....

In simple sense, you can understand force as a tendency to change the position of a body from rest to motion and vice verca. You need to apply force to stop a moving body or to move a resting body. You require force to increase or decrease the speed .....

soln, = p2 - q2 - r2- 2qr = p2 - (q2 + 2qr + r2) = p2 - (q + r)2 = (p + q + r)[p - (q + r )] = (p + q + r)(p - q - r .....

Do you know profit amount = cp * p % now, sp = cp + profit amount    = cp + cp * p% = 1500 + 1500 * 10/100 = 1500 + 15 * 10 = 1500 + 150 sp = .....

soln, the cost of 6kg apples = rs. 540 the cost of 1 kg apple = rs. 540 / 6 = rs. 90 hence,  the cost of per kg apple = rs. .....

As you know transformer is used to convert high voltage AC to Low voltage or vice versa. We see the core of any transformer is laminated, this is because of following reason:

- regulate the energy loss due to eddy .....

Transformers are used to change alternating currentvoltage level. If a transformer was not invented wont be able to supply electricity from one destination to another far .....

A transformer is used either to increase or decrease (change) voltage and current in an electrical circuit. In a transformer, the number of turns in primary and secondary coils is different. This cause the change of voltage and current in an .....

As you know , force is something which helps to push or pull any object and change its motion. For our daily lie work like writing, walking, balancing, shifting, carrying etc we need .....

As you said  ABC is a triangle and abc are its angle. do you know that ? the sum of interior angle of a triangle is 180o, so we do same a+b+c=180o or,2x+20o + 3x-20o+c=180o  as x=20o so, or,2x20+20+3x20-20 + .....

complete your .....

 Do you know? Sodium hydroxide dissociate rapidly in water and produce high OH- ion. And  Hydroxide ions will readily accept H+ from an added acid to produce water. so it is atrong base. Ammonium hydroxide where as the the .....

soln =1x+3y-5z + .....

venn diagram is the symbolic representation which shows the relation of two or more than two groups using circular diagram. following is the picture of ven diagram: its shows the relation between three .....

soln let a be the natural number then by question 22+ a2. 1/3 = 49 or a2. 1/3 =49-22 or a2. 1/3=27 or  a2= 27 x 3 or a2=81 or a = √81 or a=9 ∴ The natural number is .....

wood is not suggested to use as a fuel although it can be replenished , this is because three usually take 10-15 years to grow properly and while burning the woods it produces carbon in air as a smog which increases air polution and directly affect .....

As you know ice is very cold substance. And before touching the ice our hand is warm but when we touch the ice the warmness or heat of hand flows to ice and our hand become cold. Due to this reason we react when we touch the .....

As you know soil is the basic need of all the humanbings and other's too. soil gives us food, habitat, water etc with out which we can not survive. Polution of soil may cause reduction of agricultural yields, decreases water quality etc. To .....

Environment is the somthing which is surrounded by liiving and non living things.  All the factors in the environment msy directly or indirectly influence human life. For example things likeanimals, plants, forests, fisheries, and .....

According to newton, there is a direct relationship between the masses of either body and the gravitational force exerted between them. But the distance between the bodies represents an inverse relationship to the force of gravity. if m1 and .....

soln given =a3-a +b3-b =(a3+b3) -a-b =(a3+b3) -(a+b) =(a + b) (a2 - ab + b2 ) -(a+b)          ∵(a3 + b3) = (a + b) (a2 - ab + b2 ) ∴(a + b)(a2 - ab + .....

  6x/4 = 14 - x/4 or, 6x/4 + x/4 = 14 or, 7x/4 = 14 or, 7x = 14 * 4 or, x = 56/7 or, x = .....

You know rocks.  They are hard and strong. The heat of sun, rain and blow of wind breaks rocks into smaller particles. The smaller particles of rock deposite on lower land. which is called .....

when an ant bites we feel that our skin is burning this is beacause ant drops some the of acidic venom off their mouths on your skin which causes you to feel that burning pain. The pain is due to the acidic .....

when touch a nettle we feel that our skin is burning this is beacause they contain chemicals  which causes you to feel that burning pain. The chemical is formic acid which causes painful .....

soln let x-y=5..........(i) x+2y=20.....(ii) substracting eq (i) from (ii) we get, or, (x+2y)-(x-y)=20-5 or, x+2y-x+y=15 or, 3y=15 or, y=15/3 ∴y=5 putting the value in eq (i) we get, or, x-5=5 or, .....

solution, given Area of 4 walls =100m2 we know, Area of 4 walls =2(l+b)h since the room is cubical so, l=b=h then, 2h(l+b) = 100 or, 2l (l+l)=100 or, 2l x 2l =100 or, 4l2=100 or, l2=100/4 =25 or, l= (25)1/2 = 5m now area of the floor = l x b = .....

.....

.....