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3 years ago

Please help!!!

1 answer:

7 0

The answer is: The first box.
The explanation is shown below:
1. You must apply the formula for calculate the area of regular pyramid, which is:
A=Base area+(PerimeterxSlant height)/2
2. The area of the first box is:
Slant heigth=√(45 cm)²+(15 cm)²
Slant height=47.43
A1=(30 cm)²+(30 cmx4)(47.43 cm)/2
A1=3745.8 cm²
2. The area of the second box is:
Slant heigth=√(35 cm)²+(10 cm)²
Slant height=36.40 cm
Base area=(10 cmx7.5 cm/2)16
Base area=600 cm²
A2=600 cm²+(120 cm)(36.40 cm)/2
A2=2784 cm²
3. Therefore A1>A2

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3 years ago

One side of a rectangle is 3 times the length of another side. The difference in their lengths is 10 feet

elena55 [62]

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The question is to find the lengths of 2 sides of the rectangle.

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Let shorter side be "x"

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