A plane travel 216 miles per hour Work out an estimate for how many seconds it takes to travel in 1 mile.

18 seconds

Explanation:

There a 60 minutes in one hour. There are 60 seconds in one minute.

60 multiplied by 60 is 3600.

Therefore the plane travels 213 miles in 3600 seconds. To find out how many seconds it takes the plane to travel 1 mile : Divide 3600 by 213.

Because this is an estimation. We can divide 3600 by 200

which equals = 18

225% as a mixed number is 2 and 1/4  as a fraction: 9/4