a train 270 m long , running with a speed of 108 km / hr will pass a tree in
"sol . speed = ( 108 x 5 / 18 ) m / sec . = 30 m / sec . time taken = ( 270 x 1 / 30 ) sec = 9 sec answer b"
multiply(divide(270, multiply(108, const_1000)), const_3600)