Question

A train travels 16 miles in 20 minutes . At this rate ٫ how many minutes will it take to travel 12 miles

Answer 1

We will establish simple proportions. If
`16` miles takes
`20` minutes, how many minutes for
`12` miles?

• 
  `16miles/20min`
• 
  `0.8miles/min`

That makes
`12` miles in
`15` minutes.

• 
  `0.8(12)=12miles/?min`
• 
  `?=15min`