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 40min will be	Choose one:
A) 45 min
B) 60 min
C) 55 min
D) 70 min
E) 75 min
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= 40/60hr = 2/3hr   New speed = 40* 3/2= 
<gadget id="calculator">40* 3/2</gadget>
<output>60</output>
60kmph   Answer : 60 min
<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 40min will be