A train covers a distance in 1 h 40 min, if it runs at a speed of 96 km/h on an average. Find the speed at which the train must run reduce the time of journey to 1 h 20 min.	Choose the correct choice:  A) 120 km/h  B) 90 km/h  C) 144 km/h  D) 150 km/h  E) 160 km/h
Distance= Speed x Time = 96 x (100/60) = 160 km   New time = 80/60 h = 4/3 h   New speed = 160 x 3/4 = 40 x 3 =120 km/h   120 km/hnswer :120 km/h
<result>A</result>
A train covers a distance in 1 h 40 min, if it runs at a speed of 96 km/h on an average. Find the speed at which the train must run reduce the time of journey to 1 h 20 min.