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Two trains A and B are moving on paralle...

Two trains A and B are moving on parallel tracks with velocities 60 km/h and 90 km/h respectively, in opposite directions. The relative velocity of train A with respect to train B is

A

30 km/h

B

60 km/h

C

90 km/h

D

150 km/h

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TARGET PUBLICATION-Motion in a plane-Exercise
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  17. The relation between time of ascent taand time of descent td is

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