Erin rode her bike 30 miles in 120 minutes. she rode at a constant speed. how long did it take her to ride 20 miles?

First, you want to find how long in 1 mile. 120 ÷ 30 = 4 minutes for 1 mile. Then, to find how long in 20 miles, you have to multiply
20 miles x 4 minutes = 80 minutes in 20 miles. I hope this is √.

√ = correct

We’re gonna need a picture to refer to in order to figure it out. try reposting your question with the picture included.