a train 280 m long , running with a speed of 63 km / hr will pass a tree in
"solution speed = ( 63 x 5 / 18 ) m / sec = 35 / 2 msec time taken = ( 280 x 2 / 35 ) m / sec = 16 sec . answer b"
multiply(divide(280, multiply(63, const_1000)), const_3600)