A train covers a distance in 50 min, if it runs at a speed of 48kmph on an average. The speed at which the train must run to reduce the time of journey to 45min will be.  Select the correct option
A) 60 km/h B) 53 km/h C) 40 km/h D) 70 km/h E) 65 km/h
Time=50/60 hr=5/6hr   Speed=48mph   distance=S*T=48*5/6= 
<gadget id="calculator">48*5/6</gadget>
<output>40</output>
40km   time=45/60hr=3/4hr   New speed = 40* 4/3 kmph= 53kmph   Answer : 53 km/h
<result>B</result>
A train covers a distance in 50 min, if it runs at a speed of 48kmph on an average. The speed at which the train must run to reduce the time of journey to 45min will be.