Question

Jen went from Boston to Cape Cod at 60mph. On the way back, the traffic was bad and the return trip took three times as long. What was Jens average speed on the round trip.

Answer 1

Suppose the trip took 2 hours, meaning the return trip took 6 hours.

Boston to Cape Cod:

(60 mph)(x hours) = 60x miles

Cape Cod to Boston:

60x miles/3x hours = 20 mph

Average speed for round trip:

120x miles/4x hours = 30 mph