Question

plzzzzzzzz help me to solve

Answer 1

This answer is for 14th one

Total surface area of cube =2400cmsq

Surface area (formula)= 6a^

(This ^ symbol represents square)

So , 6a^ = 2400

a^ = 2400/6

a^ = 400

Now for removing square from a we should know the square root of 400 that is 20cm (20× 20 = 400)

So the side of the cube is 20cm