a train running at the speed of 108 km / hr crosses a pole in 7 seconds . find the length of the train .
"explanation : speed = 108 * ( 5 / 18 ) m / sec = 30 m / sec length of train ( distance ) = speed * time = 30 * 7 = 210 meter option e"
multiply(divide(multiply(108, const_1000), const_3600), 7)