## anonymous 5 years ago find the surface area and volume of a rectangular prism with dimensions x, 3x+4, 3x+6

1. anonymous

Let x be the height, 3*x+4 the width and 3*x+6 the length. Surface area = twice the sum of the height, width and length. $2x(4+3x)+2x(6+3x)+2(4+3x)(6+3x)\text{=}48+80x+30x^2$ Volumn is the product of the height, width and length. $x (4+3 x) (6+3 x)\text{==}24 x+30 x^2+9 x^3$

2. anonymous

Surface area above is incorrect. It should have been: $2(x+(3x+4)+(3x+6))\text{==}14 x+20$

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