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To import knowledge in the EVS, which of the following is most appropriate strategy?

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CBSE Class 10 Hindi Most Important Questions | 5 Mark Most Expected Questions | CBSE Board 2020

There are 200 questions in a 3 h examination. Among 200 questions, 50 are from Mathematics, 100 are from GK and 50 are from Science. Ram spent twice as much time on each Mathematics question as for each other question. How many minutes did he spend on Mathematics questions ?

CBSE Class 10 Hindi - लेखन Most Important Questions | 26 Marks Most Expected Questions | CBSE Board 2020

A fort is at the top of a hill of height h above the sea-level.Prove that the greatest horizontal distance from which a gun in the ship can hit the fort is 2sqrt(k(k-h)) where sqrt(2gk) is the muzzle velocity.

The specific heat of a substance varies with temperature according to c =0.2 +0.16 T + 0.024 T^(2) with T in "^(@)c and c is cal//gk . Find the energy (in cal) required to raise the temp of 2g substance from 0^(@)to 5^(@)C