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A boat at anchor is rocked by waves whos...

A boat at anchor is rocked by waves whose crests are `100 m` apart and whose speed is `25 m//s`. These waves reach the boat once every :

A

0.35 s

B

4 s

C

75 s

D

2500 s

Text Solution

Verified by Experts

The correct Answer is:
B
`v = nlamda`
or `25 = n xx 100`
or `n = 25/100 = 1/4 Hz`
`therefore T = 1/n = 4s`
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