a train speeds past a pole in 10 seconds and a platform 150 m long in 25 seconds . its length is :
"let the length of the train be x meters and its speed be y m / sec . they , x / y = 10 = > y = x / 10 x + 150 / 25 = x / 10 x = 100 m . answer : option c"
multiply(150, subtract(const_2, const_1))