Question

ria was trying to burn a piece of paper which easily burnt but a book made of same paper took time to burn. what is the reason behind it?​

Answer 1

Explanation:

If we want to burn a paper by focusing sunlight then we have to use converging lens which can converge all sunlight at a point called focus.

Thus Convex lens is used to burn paper.

Answer 2

The book had more paper although the small piece of paper is just a piece of paper.