GMAT Quantitative Reasoning Practice Test 4

Question : 66 of 100

Marks: +1, -0

The running speed of a horse is three times faster than the
jogging of a donkey.
If a horse is running for 4 hours and a donkey is jogging for 3 hours, what is the horse’s speed (in km/h) if the sum of their distances is 45 km?

Validate

Solution:

X is the donkey’s speed and 3X is the horse’s speed. The total amount of distance is Equal to 45 and to

3X × 4 + X × 3 = 15X → X = 3

, the speed of a horse is 9.

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