A boat can travel at 10 m/s in still water. If river speed is 6 m/s, time taken to cross river of width 400 m in shortes...

Type: MCQ • Marks: 1

A boat can travel at 10 m/s in still water. If river speed is 6 m/s, time taken to cross river of width 400 m in shortest time is:

A. 50 seconds

B. 25 seconds

C. 66.7 seconds

D. 40 seconds

Explanation

Shortest time occurs when heading directly across: t_min = width / v_boat = 400 / 10 = 40 seconds.

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UP TGT Mathematics

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