Q 64. A leaf is caught in a whirlpool. At a given instant, the leaf is at a distance of 120 m from the center of the whirlpool. The whirlpool can be described by the following velocity distribution:
where r (in meters) is the distance from the center of the
whirlpool. What will be the distance of the leaf from the center when it has moved through half a revolution?
(A) 48 m
(B) 64 m
(C) 120 m
(D) 142 m
Answer: (B)
Explanation:
