Question

In 10 minutes, a heart can beat 700 times. At this rate, in how many minutes will a heart beat 140 times? At what rate can a hear beat?

Answer 1

$$rate=\dfrac{N}{t}=\dfrac{700\ times}{10\ min}=70\ times/min$$

$$t=\dfrac{N}{rate}=\dfrac{140\ times}{70\ times/min}=2\ min$$

2 minutes

A hear can beat at rate 70 times/min.