Two trains A and B start from two places P and Q towards Q and P respectively . After passing each other they take 4 hours 48 minutes and 3 hours and 20 minutes to reach Q and P respectively . If the train from P is moving at 45 km/h then find the speed of other train .

Options

A. 69 km/h
B. 74km/h
C. 54km/h
D. 64 km/h

Answer

C

Explanation

Speed of 2nd train = Speed of first train `xx (sqrtT`ime taken by 1st train after meeting /`sqrtT`ime taken by 2nd train after meeting) = `sqrt(200 : 288) = 5 : 6` .
`implies r_(2) = 54`km/hr