# Question #9de8c

##### 1 Answer

Apr 17, 2016

Average speed,

#### Explanation:

Define the distance of A to B as *x*.

Average speed is total distance divided by total time taken. We already know that since the man walks from A to B and then B to A he travelled a distance of *2x*. All we need to calculate is the total time taken.

**Calculate the times taken. **

A to B:

B to A:

**Calculate total time and then average speed. **

Total time taken,

Average speed,