1.

A train A is 180 m long,while another train B is 240 m long.A has a speed of 30km/h and B's speed is 40 km/h. If the trains move in opposite directions, find when will ApassBcompletely?

Answer»

a. 21s
B. 21.6s
c. 26.1s
d. 26s

Answer :B


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