Question

A 150-pound person uses 6.2 calories per minute when walking at a speed of 4 mph. How long must a person walk at this speed to use at least 230 calories?

Answer 1

The time taken by person to use 6.2 calories is 1 min.

Therefore, the time taken to use 230 calories can be calculated as,

$\begin{gathered} t=\frac{(230\text{ calories)(1 min)}}{(6.2\text{ calories)}} \\ \approx37.1\text{ min} \end{gathered}$

Thus, the time taken to use 230 calories is 37.1 min.