Problem
2023 Fermat Problem 8
A bicycle trip is 30 km long. Ari rides at an average speed of 20 km/h. Bri rides at an average speed of 15 km/h. If Ari and Bri begin at the same time, how many minutes after Ari finishes the trip will Bri finish?
\textbf{(A)}\ 50 \text{ min}\quad \textbf{(B)}\ 40 \text{ min}\quad \textbf{(C)}\ 30 \text{ min}\quad \textbf{(D)}\ 20 \text{ min}\quad \textbf{(E)}\ 10 \text{ min}
If there are no answer choices shown, enter a numerical answer.
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