At the beginning of every gym class, Mr. Gordon leads the class in a warm-up. In today's warm-up, the class does jumping jacks for 3 minutes. Erin does 54 jumping jacks in that time. Mr. Gordon says the class will do jumping jacks for 4 minutes tomorrow.

Question

If Erin does jumping jacks at the same rate tomorrow, how many will she do?
jumping jacks

Answer 1

To determine how many jumping jacks Erin will do during the 4-minute warm-up tomorrow, we first need to find her rate of doing jumping jacks per minute.

From the information given, Erin does 54 jumping jacks in 3 minutes. We can calculate her rate as follows:

\[ \text{Rate} = \frac{\text{Total jumping jacks}}{\text{Total time in minutes}} = \frac{54 \text{ jumping jacks}}{3 \text{ minutes}} = 18 \text{ jumping jacks per minute} \]

Now, to find out how many jumping jacks Erin will do in 4 minutes at the same rate, we multiply her rate by the number of minutes:

\[ \text{Total jumping jacks} = \text{Rate} \times \text{Time} = 18 \text{ jumping jacks per minute} \times 4 \text{ minutes} = 72 \text{ jumping jacks} \]

Therefore, if Erin maintains the same rate, she will do 72 jumping jacks tomorrow during the warm-up.