in what time will a train 150 metres long cross an electric pole , if its speed be 122 km / hr ?
"solution speed = ( 122 x 5 / 18 ) m / sec = 33.88 m / sec time taken = ( 150 / 33.88 ) sec = 4.42 sec . answer d"
divide(150, multiply(122, const_0_2778))