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Question

A river flows due south with a speed of 2.0 m/s. A man steers a motorboat across the river; his velocity relative to the water is 4 m/s due east. The river is 800 m wide. How far south of his starting point will be reach the bank?


A

400 m

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B

800 m

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C

200 m

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D

500 m

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Solution

The correct option is A

400 m


In the previous question, we found the time taken to be 200 s, in the same time he would have traversed

vy×tm

y=vy×t

= 2×200

= 400m


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