Solve this:
Q.4. A trolley of mass 20 kg carries 16 kg grain and moves on a horizontal smooth and straight track at 20 m s - 1 . If the grain starts leaking out of a hole at the bottom at time t = 0 s at the rate of 0.5 kgs-1, the speed of the trolley at t = 22 s will be nearly
A. 13.5 m s - 1
B. 15 m s - 1
C. 24 m s - 1
D. 26 m s - 1

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actually velocity does not depend upon mass. so i think the question may be incorrect. who knows?
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