Problem: a train 600 m long can cross an electric pole in 20 sec and then find the speed of the train ?
Rationale: "length = speed * time speed = l / t s = 600 / 20 s = 30 m / sec speed = 30 * 18 / 5 ( to convert m / sec in to kmph multiply by 18 / 5 ) speed = 108 kmph answer : b"
annotated_formula: divide(divide(600, const_1000), divide(20, const_3600))