Vishwanath
Monday, February 18, 2013
55.A train 108 m long moving at a speed of 50 km / hr crosses a train 112 m long coming from opposite direction in 6 seconds. The speed of the second train is
A. 48km/hr B. 54 km/hr
C. 66km/hr D. 82km/hr
Answer:
Relative speed = (x + 50) km/ hr
=(x + 50) x 5/18 m/sec
= 250 + 5 x /18]m/sec
Distance covered = (108 + 112) m
= 220 m
= 220 / (250 + 5x / 18) = 6
= 250 + 5 x= 660
= 82 km / hr.
Title : Trains Q55
Description : 55.A train 108 m long moving at a speed of 50 km / hr crosses a train 112 m long coming from opposite direction in 6 seconds. The speed of t...
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