BTGModeratorVI wrote: ↑Mon Sep 07, 2020 6:58 am
The cost of Brand V paper is proportional to the weight. If 18 ounces of Brand V paper cost $ 3.06, what is the cost of 24 ounces of Brand V paper?
A. $4.08
B. $5.58
C. $6.12
D. $7.31
E. $7.59
Answer:
A
Source: Kaplan
Since cost is PROPORTIONAL to weight, we can use EQUIVALENT RATIOS
We'll compare
cost/
weight
Let x = the cost of 24 ounces of paper
So, we get:
3.06/
18 =
x/
24
Cross multiply to get: (18)(x) = (24)(3.06)
Divide both sides by 18 to get: x = (24)(3.06)/18
ASIDE: From here, we can use estimation to find the value of x.
Notice that (24)(3.06) is a little bit bigger than (24)(3)
So, (24)(3.06) = a little bit bigger than 72, which we can denote as
72+
We get: (24)(3.06)/18 =
72+/18
= 4+ (a number a little bit bigger than 4)
Answer: A
Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
