Three boats were timed over 24 km on the SAME river (table). One set of timings must have been recorded wrongly because it gives a different current. Which boat's?

Question

Accepted Answer

R. Current = (down − up) ÷ 2. P: (12 − 8)/2 = 2; Q: (16 − 12)/2 = 2; R: (24 − 16)/2 = 4; S: (10 − 6)/2 = 2 km/h. Only R disagrees.

Three boats were timed over 24 km on the SAME river (table). One set of timings must have been recorded wrongly because it gives a different current. Which boat's?

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