A boy goes to a school from his home at a speed of  x  km/hr and comes back at a speed of y km/hr, then the average speed is given by

# A boy goes to a school from his home at a speed of  $x$  km/hr and comes back at a speed of y km/hr, then the average speed is given by

1. A

AM

2. B

GM

3. C

GM

4. D

none of these

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### Solution:

Let the distance between the school and the home

be $s$ km. Then, total time taken in going to and coming from the

school is given by

Average speed H. M. of x and y

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