A car is traveling at a steady speed. It travels 2 1/2 miles in 3 1/3 minutes. How far will it travel in 21 minutes ​? In ​1 hour?

Question

  A car is traveling at a steady speed. It travels

212

miles in

313

minutes. How far will it travel in

21 minutes​?

In

1 hour​?

Answer 1

2 1/2 miles in 3 1/3 minutes is 5/2 miles in 10/3 minutes

that's (5/2)/(10/3) = (5/2)(3/10) = 3/4 miles per minute

in 21 minutes, it goes 21 x 3/4 = 63/4 = 15.75 miles

in 1 hour = 60 minutes it goes 60 x 3/4 = 15 x 3 = 45 miles