Question

On marys walk, she covered the 3 mile distance in one hour. However, the return trip took an hour and a half. What was her average speed?

Answer 1

Explanation:

Speed = distance/time

Speed= 3/1= 3miles/hour

Return trip

Speed=3miles/1.5hour=2miles/hour

Average speed= initial + final trip= 2miles/hour+3miles/hour, then divide by 2

= 5/2=2.5miles/hour

Answer 2

2.4 mph

Explanation: