Question

Juan swims 5 miles a day . About how many miles would he have to run to use the same number of calories used during his swim

Answer 1

Answer: 20 miles.

Explanation:

The complete exercise is: "Swimming
`(1)/(4)` of a mile uses about the same number of calories as running 1 mile. Juan swims 5 miles a day. About how many miles would he have to run to use the same number of calories used during his swim."

Let be "x" the amount of miles Juan has to run to use the same number of calories used during his swim.

According to the information given in the exercise, when he swims
`(1)/(4)` of a mile, he uses about the same number of calories as running 1 mile.

You can convert
`(1)/(4)` to a decimal number by dividing the numerator 1 by the denominator 4. You get that:

`(1)/(4)=0.25`

Knowing that Juan swims 5 miles a day, you can set up the following proportion:

`(0.25)/(1)=(5)/(x)`

Finally, you must solve for "x" in order to find its value. This is:

`x((0.25)/(1))=5\\\\x=(5)/(0.25)\\\\x=20`