In: Math
A pilot flew a jet from City A to City B, a distance of 1600 mi. On the return trip, the average speed was 20% faster than the outbound speed. The round-trip took 5 h 20 min. What was the speed from City A to City B?
It took a crew 3 h 44 min to row 7 km upstream and back again. If the rate of flow of the stream was 1 km/h, what was the rowing speed of the crew in still water?