We respire through lungs. Insects do not have lungs. They exchange oxygen and carbon dioxide between their tissues and the air by a system of air-filled tubes called tracheae. Tracheae open to the outside through small holes .....

We know that equation of the circle is,  (x - h)2 + (y - k)2 = r2  ............ (i) Since (0, 0) lies on circle (i)  (0 - h)2 + (0 - k)2 = r2  . or,  h2 + k2 = r2  ............. (ii) Again (4, 4) lies on .....

Look at the map .....

a. Rabina went to the river however she did not fetch water. b. After earthquake, we built temporary sheds .....

Jin, P  and S. Now, ∡PSR = ∡PTR      [ angle on same arc PR.] Similarly,  ∡QUS =∡QRS       [ angle on same arc QS.] And, ∡PSR = ∡QRS       [ .....

Here, ∡B  = ∡C              [ Base angles of issoscale trap. are equal.] ∡A + ∡B = 180o         [ AD // BC, co-interior angles.] Or,  ∡A + ∡C = .....

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Here, ∡A  = ∡DCF              [ Interior angle is equal to opposite ext.angle in cyclic qd.] ∡A + ∡DCE = 180o         [ AD // EF, co-interior angles.] Or,  .....

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The power or right vested in the permanent members of UNO is called veto power. Veto power is the right to accept or reject of any "substantive" resolution.  In other words, it is the right or power to forbid or restrain any order .....

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Here, sin4(π/8) + sin4(3π/8) + sin4(5π/8) + sin4(7π/8) = sin4(π/8) + sin4(3π/8) + sin4( π - 3π/8) + sin4(π - π/8)               [ 5π/8 =  π - .....

Most "non-magnetic" materials (such as water, plastic, wood, etc.) are diamagnetic. Diamagnetic atoms have no unpaired outer electrons and are repelled by a magnetic field.  Like water, wood also repels the magnetic .....

Our body performs different life-processes like digestion, respiration, absorption, excretion etc. For this, our body requires the energy. This energy is provided by the food we eat. When we are hungry, our body won't have the fuel it .....

Hence, some gap is left between two section of the bridge to prevent these .....

Here distance to be covered = 50 km Fare to travel 1 km = Rs. 38 Thus total cost to travel 50Km = Rs 38 x 50 (i.e total distance to be covered multiplied by fare for 1 km)                    .....

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Look at the following diagram. The diagram shows that, If we hold the thumb, forefinger and middle finger of the left hand perpendicular to each other then, the forefinger indicates the direction of magnetic field,  the middle finger .....

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Use coordinates of A, B and C to fide value of .....

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        महिला सशक्तिकरण स्थानः कीर्तिपुर, काठमाडौँ समयः बिहान १० बजे  पात्रहरुः अरुण .....

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The methods of using rice cooker with safety measures are as follows: - Measure the rice with your cup and put it in the pot. - You can wash the rice if neccessary. - Measure the water for cooking food. - You can also let your rice soak in water .....

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Micro oven is a device for cooking food. At first, the micro oven should be connecte to the electricity. The right temperature of the oven should be fixed. And then, the food to be cooked should be kept inside the oven. And then, it should be .....

Solution: We know,  corresponding angles of congurrent triangles are equal. So, y + 10o = 122o                     and           x = .....

A plain is a flat land which is, in fact, a low land. Some plains are formed by deposition of materials that are carried by rivers. Terai, some tars, etc. are examples of .....

The speed of the train be x km/hr, the time required for the journey be t hrs, and the distance be d km. So, we have, in the first case, d = x  t …….(1) In the second case, if the train is 10 km/hr faster, the speed would be .....

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Let ,  The numberof students in each row be 'x' The number of rows be 'y' Therefore, Total number of students = x  y Now, according to question, 1st condition is, (x + 3) (y - 1) = xy or, xy - x + 3y .....