Two trains A and B which are 100 km apart are travelling towards each other on different tracks with each having initial speed of 50 km/h . The train A accelerates at 20 km/h 2 and the train B retards at the rate 20 km/h 2 . The distance covered by the train A when they cross each other is :
Text Solution
Verified by ExpertsThe correct answer is:
D
Initial relative velocity
u r = 50 – (– 50) = 100
a r = 20 – (20) = 0
s r = υ r t + 
a r t 2
100 = 100 t t = 1 hr
s A = 50 + 
(20) 2 = 60 km.
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