A body Covers half of its journey with a speed of 30km/h and the other half with a speed of 50 km per hour then the average speed during the whole journey is :
MCQ Question
Answers
Answered by
9
Answer:
Let the body travel a distance of 2d km, total.
The first half of the distance takes d km/30 kmph = d/30 hr.
The second half of the distance takes d km/50 kmph = d/50 hr.
So the total time taken to cover 2d km = (d/30)+(d/50) = 80d/150 hr.
The average speed of the body = Total distance/ total time = 2d/[80d/150]
= 2d*150/80d
= 37.5 kmph.
Explanation:
pls mark it as brainliest
Answered by
3
Answer:
37.5 km/h
Explanation:
It is the correct answer.
Similar questions