a train travels some distance with the speed of 30km/h and returns with the speed of 45 km/h .calculate the speed of the train
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Let d/2 be distance covered by the train with a speed of 30 kmph in t1 hours
t1 = d/ 60
it covers d/2 distance with a speed of 45 km/h in t2 hours
t2 = d / 90
average speed = total distance / total time
= d/ t1 + t2
= 1/(1/60 +1/90)
= 1/(3+2)/180
= 180 / 5 = 36 km per hour
HOPE it helps you and pls mark as brainlist
t1 = d/ 60
it covers d/2 distance with a speed of 45 km/h in t2 hours
t2 = d / 90
average speed = total distance / total time
= d/ t1 + t2
= 1/(1/60 +1/90)
= 1/(3+2)/180
= 180 / 5 = 36 km per hour
HOPE it helps you and pls mark as brainlist
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