Question 27

If an anchored boat is rocked by waves whosecrests are 80 m apart and whose velocity is
20 m/s, then the time required by the crests to reach the boat is .........

Solution

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The correct option is D.

Required time = $$\frac{(distance)}{speed}$$

                   = $$\frac{80}{20}$$ = 4 sec.

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