GMAT Quantitative Reasoning Practice Test 3

Question : 18 of 100

Marks: +1, -0

A green lizard can travel from the green cave to the blue cave in 108 minutes; the blue lizard can travel from the blue cave to the green cave in 25% less time. If the green lizard started to travel 7.5 minutes before the blue lizard, how many minutes after the blue lizard, will the green lizard pass the middle line?

Validate

Solution:

It takes the green lizard

(108 / 2=54)

minutes to reach the middle.
It takes the blue lizard

(108 × 0.75=81) {/} 2=40.5

minutes to reach the middle.
The green lizard started to travel 7.5 minutes ahead of the blue lizard and therefore the differences in the time they reach the middle is

(54-7.5-40.5=6)

minutes.

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