﻿ Two persons A and B are walking with speed 4 km/hr and 5 km/hr respectively in the same direction. Find how far will be B from A after 3 hours?  from Physics Motion in A Plane Class 11 Manipur Board

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Two persons A and B are walking with speed 4 km/hr and 5 km/hr respectively in the same direction. Find how far will be B from A after 3 hours?

Relative velocity of B w.r.to A,

vBA = vB - vA

= 5- 4 = 1 km/hr

Therefore, distance of B ahead of A in time is,

d = vAB x t

= 1 x 3

= 3 km

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