A boy walks to his school at a distance of 6km with a speed of 3km/h and walks back with a constant speed of 2km/h. His average speed for round trip in km/h is:
Correct answer: B. 2.4
- A. 2.5
- B. 2.4
- C. 5
- D. 2.3
Explanation
We find out the average speed by using2v1v2/(v1+v2) = 12/5 = 2.4 km/h
Last updated
Related questions
1024 can be written in scientific notation as______________?
A body can have constant velocity when it follows a_____________?
A body is moving with uniform velocity. Its______________________?
A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be_____________?
A cyclist moves a distance of 4km toward east and then a dostance of 3km towards north. How far is he from the starting point?