Boats & Streams · Question 13 · Hard
Boats & Streams question 13
Rowing upstream, Arjun drops his cap into the river. He notices 15 minutes later, turns around immediately and rows downstream at the same effort to pick it up. How long after turning does he reach the cap?
- It depends on the speed of the current
- 30 minutes
- 15 minutes
- 10 minutes
Answer and explanation
Answer: C. 15 minutes
Explanation: Relative to the water, both the boat and the cap ignore the current: the boat moves away from the cap for 15 minutes and returns at the same speed relative to the water, so it takes another 15 minutes.
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