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The outside of the rectangular box represented in the figure

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by AAPL » Sat May 04, 2019 3:05 am

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The outside of the rectangular box represented in the figure above is to be decorated by attaching pieces of wrapping paper to cover all surfaces except the bottom of the box. What is the minimum number of square inches of wrapping paper needed?

A. 375
B. 600
C. 725
D. 800
E. 1250

OA B
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by ceilidh.erickson » Sat May 04, 2019 1:56 pm
If we want the minimum amount of wrapping paper, we want to know the SURFACE AREA of all surface except the bottom surface. Calculate each:

Top surface area = 25 x 10 = 250
2 sides of 5 x 10 = 2(5*10) = 100
2 sides of 5 x 25 = 2(5*25) = 250

250 + 100 + 250 = 600

The answer is B.
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by Scott@TargetTestPrep » Mon May 13, 2019 5:36 pm
AAPL wrote:GMAT Prep

Image

The outside of the rectangular box represented in the figure above is to be decorated by attaching pieces of wrapping paper to cover all surfaces except the bottom of the box. What is the minimum number of square inches of wrapping paper needed?

A. 375
B. 600
C. 725
D. 800
E. 1250

OA B

The top face has an area of 25 x 10 = 250 sq. in.

The front and back faces have a total area of (25 x 5) x 2 = 250 sq. in.

The right and left faces have a total area of (10 x 5) x 2 = 100 sq. in.

Therefore, we need 250 + 250 + 100 = 600 sq. in. of wrapping paper.

Answer: B

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