a goods train runs at a speed of 72 kmph and crosses a 270 m long platform in 26 seconds . what is the length of the goods train ?
"s = 270 + x / t 72 * 5 / 18 = 270 + x / 26 x = 250 answer : b"
subtract(multiply(multiply(72, const_0_2778), 26), 270)