Kinematics Question 331

Question: A boat crosses a river with a velocity of 8 km/h. If the resulting velocity of boat it’s 10 km/h then the velocity of river water is [CPMT 2001]

Options:

A) 16 sec

B) 12 sec

C) 10 sec

D) 8 sec

Show Answer

Answer:

Correct Answer: D

Solution:

Relative velocity $ =10+5=15m/s $ .

Time taken by the bird to cross the train $ =\frac{120}{15}=8\sec $



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