A. 10.8

B. 18

C. 30

D. 38.8

A train crosses a platform 100 m long in 60 sec at a speed of 45 km/hr. the time taken by the train by the train to cross an electric pole is:

A train running at 7/11 of its own speed reached a place in 22 hours. How much time could be saved if the train would have run at its own speed?

In what time will a train 100 meters long cross an electric pole, if its speed be 144 km/hr?

A 120m-long train crosses a 30-long bridge in 7.5 seconds. What is the speed of that train in km/h?

A salesman travels a distance of 50 km in 2 hours and 30 minutes. How much faster, in kilometers per hour, on an average, must he travel to make such a trip in 5/6 hour less time?