You may know, Centroid (O) = ( xo , yo ) = [(Ax + Bx + Cx) / 3 , (Ay + By  + Cy) / 3 .....

There are small star or rod shaped structures which are embedded in the body of poriferans. They are made up of small silicon or calcium carbonate elements. These structures are called as spicules. They provide additional protection and .....

After 10 years, x + 10 : y + 10 = 5 : 2 i.e. (x + 10) /( y + 10) = 5 / 2 -------- (2) Substitute the value of 'x' from  (1) into (2) and we get... 5 y + 10  / y + 10  =  5 / 2 or, 2 (5 y + 10)  = 5 (y + 10 .....

Cocoons are delivered to the factory by the farmers. These factories are called filature operations. Once the cocoon s reach the filature operations, they are arranged by color, size, shape and texture. After the cocoons have been arranged, they .....

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Let,  AB = x, be the height of pole, From   ∆ BCD   tan30°=CD / BC or, 1/ √3  =   20 / BC or,  BC  =  20  √3 Then, from ∆ABC   tan60°=AB .....

दोश्रो जनआन्दोलन पछीको अवस्था निकैनै परिवर्तनशील भएपनी सामजिक र आर्थिक रुपमा तेस्तो ठुलो .....

पञ्चायती व्यवस्था निर्दलिय सामन्ती ब्यवस्ता थियो जसमा जनताको सार्वभौमसत्ताको चरम शोषण .....

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आम निर्वाचन भनेको राष्ट्र .....

पहिलो संविधान सभाबाट संविधान निर्माण हुन नसक्नुका कारणहरु निम्नानुसार उल्लेख गरिन्छ: - .....

In the figure, ABCD is the cyclic quadrilateral Therefore, <ABC = <EDC (being exterior opposite angle of cyclic quadrilateral) <ABC + < ABF = 1800 Substitute the values and .....

वि सं २००७ फागुन ७ मा प्रजातन्त्रको स्थापन सगैँ देशको समग्र आर्थिक, सामाजिक, सास्कृतिक र .....

भिमदत्त पन्त स्वतन्त्रताको लागि लडाइ लड्ने क्रान्तिकारि ब्यक्ति थिए .....

From the figure, <AQB = <APB  ( being angles on same arc AB) <AOB = 2 < AQB ( being central angle and circumference angle of same arc AB) OR, <AOB = 2 < APB   (same as above ) Substitute the values and .....

You may have learnt why switch is used. A switch is used to cut off electric supply in a circuit. The function of main switch is also same. When the main switch is turned off, it cuts off electric supply in whole house. This is useful for .....

The fuse is always connected in the live path because if live wire gets short circuited somewhere within the appliance and results into the high current then the fuse can blow and protect the appliance. In case if the fuse is connected in the to .....

They convert the stored chemical energy into electrrical energy. We use dry cells most commonly in our house for poweing electronic devices like torch light, clock, radio, camera, remote etc.  So, dry cell is a common .....

You may know that a cell always has some internal resistance. Because of this internal resistance,there is always voltage drop associated with the cell. Even if the cell is not used, there is always drop. Eventually, after long time the cell .....

In the question, Compound .....

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The things to be learnt by Nepal from the developmental activities held in Tropical grassland are listed below: - Nepal should focus on the commercialization and professionalization of agriculture. - As the Tropical grassland is the zoo of the .....

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Now, the difference between one fourth and one fifth of the 20 m long ribbon is,                                                 .....

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Let a/b be the required fraction. Then as question given we can write, (1 + 1/2) x (1/3) - a/b = 1/4 or, {1 x (2/2) + 1/2} x (1/3) - a/b = 1/4  [ making denominator equal] or, (2/2 + 1/2) x (1/3) - a/b = 1/4 or, {(2 + 1)/2} x (1/3) - a/b = .....

You may know that energy crisis simply means the scarcity of the energy sources due to over use by the growing population. The demand and use of energy sources is increasing day by day with the pace of development. Due to high number of vehicles, .....

According to question,   3 x ( 3/7 - 1/4) = 3 x {(3/7) x (4/4) - (1/4) x (7/7)}  [ making denominator equal] = 3 x ( 12/28 - 7/28)  = 3 x {(12 - 7)/28} = 3 x 5/28 = .....

Let an object of mass 'm' be on a gravitational field of another object with mass 'M' Let the bodies be separated at a distance of 'R' m. Now, We know, From Newton's Law of Gravitation, Gravitational force of .....

According to question we can write, (3/8  + 4) x 10 = {3/8 + (4/1) x (8/8)} x 10  [making denominator equal] = (3/8 + 32/8) x 10 = {(3 + 32)/8} x 10 = (35/8) x  10 = .....

Velocity of a wave = frequency x wavelength Here if they have same frequency, the wave with high velocity  would have high wavelength  and vice versa. i.e; A has lowest  and B has highest wave .....

पदमेल कायम गर्दा कर्ताअनुसार क्रियापद राख्नुपर्छ है साथी, मानिसहरू उन्नति गर्छन् .....

 3 x (3/4) x 4x  (2/5)  - 2 x (2/5) = .....

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According question, we can write,  2 x (3/5) + 2/3     [ To make double we have to multiply by 2] = 6/5 + 2/3 = (6/5) x (3/3) + (2/3) x (5/5) [ making denominator equal] = 18/15 + 10/15 = (18+ 10)/15 = .....

The major reasons behind the beginning of the political causes are: Kathmandu is the seat of the Government of Nepal. The population of Kathmandu is more literate and educated than the people living in other parts of the country. The events that .....

X is right auricle and Y is pulmonary vein. Pulmonary veins bring oxygenated blood from lungs to thee left auricle. The right auricle collects deoxygenated blood from the blood stream and transfers it to the right .....

According to question, we can write,     1/3 + (1/2) x (1/4) = 1/3 + 1/8 = (1/3) x (8/8) +(1/8) x (3/3)  [ making denominator equal] = 8/24 + 3/24 = (8 + 3)/24 = .....

Yes, potato is seed bearing plant. But mostly, it is cultivated by vegetative propagation method. Three reasons behind this are: 1. Potato does not produce viable seeds (seeds which are able to germinate).     So, vegetative .....

In this case, it is the Tall character that is expressd. Though the plant hasboth 'tall' and  'dwarf' gene, only the Tall character is expressed. This is because of the dominance of this cha­racter. Such genes are .....

Tissue cultue is important in botany because: 1. Cultures taken from meristematic tissue are usually virus free. 2. It is a very fast way to produce a great number of plants. 3. Because cultures are grown in a controlled, sterile environment, .....

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It is the fact that Nepal is backward in economic development. We know that the decades of political instability, conflicts, corruption, etc. have paralyzed the countries economy. During the time of Maoist movement, the trade and commerce, .....

Nepal is surrounded by India and China. Being a landlocked country, Nepal has been facing the following difficulties: - Nepal has to take the permission from India and China to use the international route. - Nepal has to be depended on .....

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