Problem: a train 400 m long can cross an electric pole in 10 sec and then find the speed of the train ?
Rationale: "length = speed * time speed = l / t s = 400 / 10 s = 40 m / sec speed = 40 * 18 / 5 ( to convert m / sec in to kmph multiply by 18 / 5 ) speed = 144 kmph answer : b"
annotated_formula: divide(divide(400, const_1000), divide(10, const_3600))