Question

Lin runs 2 laps around a track in 8 minutes.

a. How many minutes per lap is that? 4

b. How many laps per minute is that?

c. If Lin runs 21 laps at the same rate, how long does it take her?

Answer 1

Part a: 4 minutes

Part b:
`(1)/(4)` lap

Part c: 84 minutes or 1 hr and 24 minutes

Explanation:

Part a:

Ok so you got part a right, it's 4 minutes.

Part b:

you would do
`(2laps)/(8min.)` that will give you
`(1)/(4)`.

So it's a quarter of a lap per minute.

Part c:

For this one we know that it takes her 4 minutes just to complete one lap, and if they're doing 21 laps that means we'll multiply 21 and 4. That gives us 84 minutes, or 1 hr and 24 min.