How many minutes did Wendy need to wait for Rick? (Answer in Minutes)
Wendy and Rick left the library at noon and cycled 480 meters to the town hall. Wendy cycled at a speed of 80 meters per minute. Ricks speed was 20 meters per minute slower than Wendy's. After cycling 1/4 of the distance, Wendy stopped and waited for Rick to catch up with her.