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A certain type of concrete mixture is to be made of cement, sand, and gravel in a ratio \(1:3:5\) by weight. What is the

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by Gmat_mission » Wed Oct 07, 2020 10:52 am

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A certain type of concrete mixture is to be made of cement, sand, and gravel in a ratio \(1:3:5\) by weight. What is the greatest number of kilograms of this mixture that can be made with \(5\) kilograms of cement?

(A) \(13\frac12\)
(B) \(15\)
(C) \(25\)
(D) \(40\)
(E) \(45\)

Answer: E

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Re: A certain type of concrete mixture is to be made of cement, sand, and gravel in a ratio \(1:3:5\) by weight. What is

by Scott@TargetTestPrep » Sun Oct 11, 2020 5:35 am
Gmat_mission wrote: ↑
Wed Oct 07, 2020 10:52 am
 A certain type of concrete mixture is to be made of cement, sand, and gravel in a ratio \(1:3:5\) by weight. What is the greatest number of kilograms of this mixture that can be made with \(5\) kilograms of cement?

(A) \(13\frac12\)
(B) \(15\)
(C) \(25\)
(D) \(40\)
(E) \(45\)

Answer: E

Source: Official Guide
Solution:

If there are 5 kg of cement, there will be 5 x 3 = 15 kg of sand and 5 x 5 = 25 kg of gravel. Therefore, there are 5 + 15 + 25 = 45 kg of the mixture.

Answer: E

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