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 the correct choice from the following answers.
A) 47 kmph
B) 60 kmph
C) 69 kmph
D) 37 kmph
E) 80 kmph
60 kmph   60 kmph   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
<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