Minutes to Seconds — Conversion & Practice

Alyssa, Shreya and Rachel are doing $5-\text{mile}$ relay run. The most one person is allowed to run is $3 \text{ miles}$, and every participant has to run at least $0.5 \text{ mile}$.

Alyssa runs at $6 \text{ miles per hour}$, Shreya takes $480 \text{ seconds}$ to run one mile and Rachel runs at $\frac{1}{10} \text{ mile per minute}$.