Monday

December 22, 2014

December 22, 2014

Posted by **Piggy** on Wednesday, February 22, 2012 at 10:52pm.

- geometry -
**Reiny**, Wednesday, February 22, 2012 at 11:09pmwidth --- x

length --- x+4

height --- 2x

surface area

= 2(x)(x+4) + 2(x)(2x) + 2(2x)(x+4)

= 112

2x^2 + 8x + 4x^2 + 4x^2 + 16x = 112

10x^2 + 24x - 112=0

5x^2 + 12x - 56 = 0

x = (-12 ± √1264)/10

= 2.355 or a negative

width = 2.355

length = 6.355

height = 4.711

check:

2(2.355(6.355) + 2(2.355)(4.711) + 2(6.355)(4.711) = 112

- geometry -
**Reiny**, Wednesday, February 22, 2012 at 11:10pmvolume = (2.355)(6.355)(4.711) = .....

**Answer this Question**

**Related Questions**

Geometry:( - The surface of a rectangular prism is the sum of: the product of ...

geometry - Find the surface area of a rectangular prism with a height of 11, a ...

geometry - calculate the area, surface area, and volume for a right rectangular ...

geometry - What is the surface area of a rectangular prism with a length of 12 ...

geometry - The surface area of a rectangular prism is 190 square inches, the ...

geometry - The surface area of a rectangular prism is 190 square inches, the ...

MATH! - The length of a triangle is twice the width. The area is 32 square units...

GEOMETRY - NEED HELP - The surface area of a rectangular prism is 190 square ...

Math - A box manufacturer wants to produce an open box for which the volume is ...

Geometry - What is the formula for finding the surface area of a right ...