Question

A train travels along a straight line at a constant speed of 60min/hr for a distance d and another distance equal to 2d in the same direction with a constant speed of 80min/hr. What is the average speed of the train for the whole journey​

Answer 1

Explanation:

please mark has brainliest answer me

Answer 2

Answer:

72m/hr

Explanation:

d=60t1

t1=d/60

2d=80t2

t2=2d/80

so, average speed=total distance covered/total time

or,(d+2d)/(t1+t2)

solve this just putting the value of t1 nd t2

=72m/hr