Question

If Mike bikes at a speed 10 mph for half an hour, how far would he go? What was Mike's speed (in average) if he covered the distance of 18 miles in 2 hours?

Answer 1

A: 5 miles

B: 9 mph

Explanation:

A:

since the speed is constant, in half an hour, Mike would travel 5 miles.

this is because: 10 miles/1 hour = 5 miles / 0.5 hours (multiply top and bottom by 1/2)

B:

`(18 miles)/(2 hours)` =
`(9 miles)/(1 hour)` = 9 mph

Answer 2

Explanation: