Question

After an exercise, Ali and Ben measured their heart rates. The ratio of their heart rates was 15:17 Bens heart beats 18 times per minute more than Ali. Calculate Ali heart rate

Answer 1

Ali's heart rate is 135 times per minute.

Explanation:

Let Ali's heart rate be denoted by x times per minute.

It is provided that Ben's heart beats 18 times per minute more than Ali.

The ratio of their heart rates was 15:17.

That is:

`(15)/(17)=(x)/(x+18)`

Solve for x as follows:

`(15)/(17)=(x)/(x+18)`

`15(x+18)=17x\\15x+270=17x\\2x=270\\x=135`

Thus, Ali's heart rate is 135 times per minute.