Question

Shelby loves to knit scarves. Normally, it takes her 15 minutes to knit 5 inches of a scarf. She plans to make a scarf that is 30 inches long.

If she knits at the same rate, how many minutes will it take Shelby to knit the scarf?

Answer 1

90 minutes

Explanation:

let x=amount of time it would take for Shelby to knit the scarf

`(15)/(5) =(x)/(30)`

cross multiply

15*30=5x

450=5x

450/5=x

x=90

It would take Shelby 90 minutes to knit a scarf that is 30 inches long.