Question

A bus traveled on a straight road for 3 h at an average speed that was 15 mph faster than its average speed on a winding road. The time spent on the winding road was 4 h. Find the average speed on the winding road if the total trip was 220 mi
A bus traveled on a straight road for 3 h at an average speed that was 16 mph faster than its average speed on a winding road. The time spent on the winding road was 3 h. Find the average speed on the winding road if the total trip was 210 mi.

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mph

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