Question

Sam's heart beats 1,965 times during 15 minutes of rowing. While resting, Sam records his heart beating 16 times in 15 seconds. What is the difference between Sam's heart rate when he was rowing vs resting?

Answer 1

67 beats per minute

Explanation:

Sam's heart rate while rowing = 1965 times per 15 minutes

So, in one minute, Sam's heart will beat =
`(1965)/(15)=131` beats per minute

Therefore, Sam's heart beats 131 times in one minutes while rowing.

While resting Sam's heart beats 16 times in 15 seconds.

In 1 second, his heart beat will be =
`(16)/(15)` beats per second

In 60 seconds(1 minutes), his heart beat will be =
`(16)/(15) * 60 = 64` beats per minute

The difference in the heart rate of Same when he was rowing vs resting = 131 - 64 = 67 beats per minute