Discussion Forum



1)

Two sticks of different lenghts burn at different rates.Each stick burns exactly for half an hour.Which of the following time intervals can we measure?


A) 10 minutes

B) 7 and half minutes

C) 5 minutes

D) 12 minutes

Answer:

Option B

Explanation:

At first one stick is lighted from two sides and the second stick is lighted from one side.

The first stick is burnt in 15 minutes.immediately, the second stick is burnt from the other side.Hence the second stick will be burnt in 7 and half minutes