a train crosses a platform of 350 m in 15 sec , same train crosses another platform of length 500 m in 20 sec . then find the length of the train ?
"length of the train be ‘ x ’ x + 350 / 15 = x + 500 / 20 4 x + 1400 = 3 x + 1500 x = 100 m answer : a"
subtract(multiply(500, divide(15, divide(15, const_3))), multiply(350, divide(20, divide(15, const_3))))