Question

Nishigandha kept a vessel containing all the ingredients for making tea in a solar cooker .shivani kept asimilar vessel on a stove .whose tea will be ready first why

Answer 1

Shivani's tea will boil first as she has kept her tea on direct flame.  This is because the direct flame produces extremely large amount of heat energy as compared to a solar cooker.

Answer 2

answer is nishigandhas vessel as it is on direct flame and the heat produced by solar cooker is less compared to stove