a train is moving at a speed of 100 km / hour . the length of the train is 100 metre . in how much time will it cross a pole ?
in order to cross the pole , the train will need to cover its own length of 100 meter . to cover 100 x 1000 meter , train takes 60 minutes or 60 x 60 = 3600 second . so , to cover 100 meter , train would take 3600 x 100 / 100 x 1000 = 3.6 second . answer : d .
divide(100, multiply(100, const_0_2778))