GMAT Quantitative Reasoning Practice Test 3

Question : 57 of 100

Marks: +1, -0

A Super-Jet airplane is flying at an average speed of 500 miles per hour. The average speed of a Turbo-Prop airplane is 15% lower than that of a Super-Jet. How long will it take a Turbo-Prop airplane
to fly 950 miles?

2 hours.
1 hour and 30 minutes.
3 hours and 15 minutes.
2 hours and 24 minutes.
4 hours.

Validate

Solution:

The average speed of a Turbo-Prop airplane is

85 \%

of that of a Super-Jet airplane, meaning

425 {\mph}

15 \%

3 / 20

fraction, so

17 / 20 × 500

is 425 .
Traveling at

425 {\mph}

, it would take the airplane 2 hours to travel 950 miles.

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