Question

A train covers a distance in 50 minutes ,if it runs at a speed of 48 kmph an average . Find the speed at which the train must run to reduce the time of journey to 40 minutes will be ??
a)8 km /h
b)11km/h
c)12km/h
d)14km/h

plz......explain and is your answer from the options??​

Answer 1

Step-by-step explanation:

run to reduce the time of journey to 40 minutes. ... Then we can get new speed for given time and DJDJTJEUEU ee. ... th time will be 40 minutes so,

Answer 2

Speed (S) = 48 kmph. Time (T) = 50 min = 50/60 = 5/6 hours. New Speed = s (let). New Time (t) = 40 min = 40/60 = 2/3 hours.

hopes this helps