A train B speeding with 120 kmph crosses another train C running in t…

Question

A train B speeding with 120 kmph crosses another train C running in the same direction, in 2 minutes. If the lengths of the trains B and C be 100m and 200m respectively, what is the speed (in kmph) of the train C?

Accepted Answer

Option A. 111 km. Answer & Solution Answer: Option A Solution: & Relative speed of the trains & = ( 100 + 2002 × 60 ) m/sec & = ( 5/2 ) m/sec & Speed of train B & = 120 kmph & = ( 120 × 518 ) m/sec & = ( 1003 ) m/sec & Let the speed of second train be x m/sec & Then, 1003 - x = 5/2 & x = ( 1003 -…