Question

two objects A and B are walking with speed 6km/h and 10 km/h respectively in the same direction. find the relative displacement of B w.r.t. A after 4 hours.

Answer 1

Relative displacement = Relative Velocity × Time
= (10 - 6) × 4
= 16 km

Relative displacement of B w.r.t. A after 4 hours is 16 km

Answer 2

Speed of object A = 6km/h 

Speed of object B = 10km/h 

Speed of object B with respect of A  = 10 - 6 = 4 km/h 

Now , 

Relative displacement = relative speed x time 

= 4 x 4 = 16 km