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  3. Two boys are standing at the ends A and B of a ground, where AB=a. The boy at B starts running in a direction perpendicular to AB with velocity v1. Th

. Two boys are standing at the ends A and B of a ground, where AB=a. The boy at B starts running in a direction perpendicular to AB with velocity v1. Th

Best Answer

(b)

Distance covered by boy A in time t

AC =V t …… (i)

Distance covered by boy B in time t

BC = V1t …… (ii)

Using Pythagoras theorem

AC2= AB2+BC2

Or (vt) 2= a2+ (V1t) 2

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