125k views
0 votes
I need help on this assignment

I need help on this assignment-example-1

1 Answer

4 votes

Given:

A figure of a rectangular prism with length l, width w and height h.

To find:

The surface area of the rectangular prism.

Solution:

The product of twice of the length l and the width w is:


2* l* w=2lw ...(i)

The product of twice of the length l and the height is:


2* l* h=2lh ...(ii)

The product of twice of the width w and the height h is:


2* w* h=2wh ...(iii)

The surface area of the prism is the sum of (i), (ii) and (iii). So, the expression for the surface area is:


A=2lw+2lh+2wh


A=2(lw+lh+wh)

Therefore, the required expression is
2(lw+lh+wh).

User JasonFruit
by
4.6k points