Multiple choice A 120 metre long train crosses a pole in 27 sec. Find the speed of the train in km/hr. 17km/hr 16km/hr 18km/hr 15km/hr None of these Reveal answer Fill a bubble to check yourself B Correct answer Explanation Train length = 120 m, time = 27 sec. Speed in m/s = 120/27 = 40/9 m/s. Speed in km/hr = (40/9) × (18/5) = 16 km/hr.