The distance between two cities is ninety miles, and a woman drives from one city to the other at a rate of 45 mph. At what rate

Question

Gre4nikov [31]

3 years ago

7

The distance between two cities is ninety miles, and a woman drives from one city to the other at a rate of 45 mph. At what rate

must she return if the total travel time is three hours and forty minutes? 27 mph 45 mph 54 mph

Mathematics

2 answers:

Vikentia [17] · Answer 1 · 2022-03-16T19:22:42+03:00

Vikentia [17]3 years ago

7 0

Answer:

C. 54 Miles

Step-by-step explanation:

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Zinaida [17] · Answer 2 · 2022-03-16T17:56:38+03:00

<span>The distance between two cities is ninety miles, and a woman drives from one city to the other at a rate of 45 mph. At what rate must she return if the total travel time is three hours and forty minutes?

1st leg DATA:
distance = 90 mi ; rate = 45 mph ; time = d/r = 2 hrs.
</span><span>2nd leg DATA:
distance = 90 mi ; time = [3 2/3 - 2] = 1 2/3 hrs; rate = 90/(5/3) = 54 mph
Ans: 54 mph</span>