[Clerk Cooperative Bank Aug, 2021]

1. An insect crawls at a rate of 3 mts/min up a vertical pole of a height of 15 mts. Every minute, it slides down through 1 mt. How long will it take to touch the top of the pole?

1. 7 min

2. 10 min

3. 5 min

4. 7\(1\over2\) min

Correct Answer :

7 min