Question

In 20 minutes, I ate 13 sub sandwiches. What is my rate in sandwiches per hour?

Answer 1

`39`

Explanation:

`"note that "20" minutes "=20/60=1/3" hour"`

`"and 1 hour "=3/3`

`rArr1/3+1/3+1/3=3/3`

`rArr3xx13=39" sandwhiches per hour"`