GMAT Quantitative Reasoning Practice Test 6

Question : 16 of 100

Marks: +1, -0

Two cars leave the same city traveling on the same road in the same direction. The second car leaves one hour after the first. How long will it take the second car to catch up with the first?
(1) The second car is traveling 10 miles per hour faster than the first car.
(2) The second car averages 60 miles per hour.

Statement (1), BY ITSELF, will suffice to solve the problem, but NOT statement (2) by itself.
Statement (2), BY ITSELF, will suffice to solve the problem, but NOT statement (1) by itself.
The problem can be solved using statement (1) and statement (2) TOGETHER, but not ONLY statement (1) or statement (2).
The problem can be solved using EITHER statement (1) only or statement (2) only.
The problem CANNOT be solved using statement (1) and statement (2) TOGETHER.

Validate

Solution:

In this type of question, remember the formula distance = rate × time. catches up, their distances will be the same. Setting the two distances equal to each other gives the equation

50 t+50=60 t

. We can subtract

50 t

from both sides and divide by 10.

\;{50}/{10}=\;{10 t}/{10}

t=5

hours.

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