a train 441 m long can cross an electric pole in 21 sec and then find the speed of the train ?
length = speed * time speed = l / t s = 441 / 21 s = 21 m / sec speed = 20 * 18 / 5 ( to convert m / sec in to kmph multiply by 18 / 5 ) speed = 76 kmph answer : c
divide(divide(441, const_1000), divide(21, const_3600))