Question

The speed of the jet Alyssa flew on from Boston to London was 480 mph. On her return flight, the speed of the jet was 600 mph with a tail wind. What was Alyssa's average speed on the round trip? Round your answer to one decimal place.

Answer 1

533.3 MPH

Explanation:

Because the round trip was divided into two segments with varying speeds, you can name the first one (480 MPH) x, and the second one, (600 MPH) y. Then you can use the formula 2xy/(x+y) and put the values in. You should get 576000/1080. After you solve it, you will get 533.333333333... But the problem has not been solved yet, because you have to round 533.33333... to the nearest tenth place, which is .3. Then you should get the answer 533.3 MPH.

Do you guys do RSM too?