Question

A boat covered 224 km along the stream in 8 hours and 128 km against the stream in 8 hours. Find the speed of boat in still water.

A 18 km/h Correct Answer Incorrect Answer
B 20 km/h Correct Answer Incorrect Answer
C 22 km/h Correct Answer Incorrect Answer
D 24 km/h Correct Answer Incorrect Answer

Solution

Downstream speed = (224/8) = 28 km/h Upstream speed = (128/8) = 16 km/h Speed of boat in still water = (28 + 16) ÷ 2 = 22 km/h

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