a train running at the speed of 20 km / hr crosses a post in 10 seconds . what is the length of the train ?
"speed = ( 20 x 5 / 18 ) = 50 / 9 m / sec . length of the train = ( speed x time ) . length of the train = 50 / 9 x 10 m = 200 m . answer : d"
multiply(divide(multiply(const_100.0, const_1000), const_3600), 10)