Rahim, while driving to school, computes the average speed for his trip to be 20 km h-1. On his return
trip along the same route, there is less traffic and the average speed is 30 km h-!. What is the average
speed for Rahim's trip?
Answers
Answered by
27
Answer:
Average speed=24km/h
Explanation:
Given-
Speed for going =20km/h
Speed for returning=30km/h
Let the distance=x
And total distance = 2x
Time for 1st journey=t1=distance/speed
t1=x/20
Time for 2nd journey = t2 =distance/speed
t2=x/30
Total time=t1+t2
=x/20+x/30
=(3x+2x)/60
=5x/60
Average speed=Total distance/Total time
=2x/5x/60
=2×60/5
=120/5
=24km/h
Answered by
2
Answers 24 km /h
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