Asked by A GOODSTUDENT
Two trains are running on parallel tracks., train A is faster than B.There is a box on each train of identical nature. But mass of box in train A is more than that of train B. If box is changed between the trains, what happens to speed of trains?
A.Same
B. A faster
C. B faster
D. none
A.Same
B. A faster
C. B faster
D. none
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