Car P and car Q competed in the same 300-kilometer race. What is the average speed of the car P?
(1) Car P completed the race in 3 hours and 40 minutes.
(2) Car Q, at an average speed of 100 kilometers per hour, completed the race 40 minutes before car P crossed the finish line.
The OA is D.
From statement 1:
We can get average speed directly (speed = dist/time).
Sufficient.
From statement 2
Car Q will complete the race in 3 hrs and car P will complete in 3 hrs 40 minutes (speed = dist/time).
Sufficient
Hence D is the correct answer.
Another approach? Someone help? Thanks!
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Car P and car Q competed in the same 300-kilometer race.
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BTGmoderatorLU
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Jay@ManhattanReview
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This is perfect.BTGmoderatorLU wrote:Car P and car Q competed in the same 300-kilometer race. What is the average speed of the car P?
(1) Car P completed the race in 3 hours and 40 minutes.
(2) Car Q, at an average speed of 100 kilometers per hour, completed the race 40 minutes before car P crossed the finish line.
The OA is D.
From statement 1:
We can get average speed directly (speed = dist/time).
Sufficient.
From statement 2
Car Q will complete the race in 3 hrs and car P will complete in 3 hrs 40 minutes (speed = dist/time).
Sufficient
Hence D is the correct answer.
Another approach? Someone help? Thanks!
-Jay
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