Question

a train covers a distance in 50 minutes if it runs at a speed of 48 km per hour on an average the speed at which the train must run to reduce the time journey to 49 minutes will be. 1) 58 kmph. 2)60kmph. 3)64kmph. 4)72kmph​

Answer 1

Answer:

2)60kmph

Step-by-step explanation:

Time = 50/60 hr = 5/6 hr

Speed = 48 mph

Distance = S*T = 48 * 5/6 = 40 km

New time will be 40 minutes so,

Time = 40/60 hr = 2/3 hr

Now we know,

Speed = Distance/Time

New speed = 40*3/2 kmph = 60kmph