- A30 hours
- B15 hours
- C60 hours
- D16 hours
Step-by-Step Solution
Let AB = d. D = d/6, U = d/10, current = (d/6 − d/10)/2 = d/30. The raft moves at the current's speed ⇒ 30 hours.
Answer: A) 30 hours
A boat goes downstream from town A to town B in 6 hours and returns upstream in 10 hours. How long would a raft take to drift from A to B?
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