Question

Brian runs 4 miles in 30 minutes. At the same rate, how many miles would he run in 48 minutes?

Answer 1

6.4 miles

Explanation:

Here we should notice that the distance that Brian runs and the spent time are two proportional variables.

Then

`(time)/(distance ) = k \ \ ;\text{where k is a constant}`

`k = (30)/(4) = 7.5`

let ‘d’ be the number of miles thatBrian would run in 48 minutes

We can write this equation:

`(48)/(d) = 7.5`

Then

`d = (48)/(7.5 ) = 6.4`