Sandy left downtown Durham, and three hours later, Mary left going 46 mph faster to catch up. After another two hours, Mary caug

Question

Iteru [2.4K]

3 years ago

7

Sandy left downtown Durham, and three hours later, Mary left going 46 mph faster to catch up. After another two hours, Mary caug

ht up. Find Sandy's average speed.

Mathematics

1 answer:

tensa zangetsu [6.8K] · Answer 1 · 2022-04-13T20:07:00+03:00

Answer:

30 2/3 mph

Step-by-step explanation:

Going 46 mph faster for 2 hours, Mary closed a (46 mi/h)×(2 h) = 92 mile gap. That gap was created in 3 hours by Sandy going ...

(92 mi)/(3 h) = 30 2/3 mi/h

Sandy's average speed was 30 2/3 mph.

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<em>Comment on the situation</em>

We wonder what sort of road and traffic situation would allow Mary to go 76 2/3 mph in downtown Durham, while Sandy traversed the same route at 30 2/3 mph.