Question

You have an aquarium in the shape of a rectangular prism. The base is 4 feet by 2 feet. The height is 3 feet. How many square feet of glass were used to build the aquarium? (The top of the aquarium is open.)

Answer 1

`44\ ft^(2)`

Explanation:

we know that

The surface area of a rectangular prism with the top open is equal to

`SA=B+Ph`

where

B is the area of the base of the prism

P is the perimeter of the base of the prism

h is the height of the prism

Find the area of the base B

`B=4*2=8\ ft^(2)`

Find the perimeter P

`B=2*(4+2)=12\ ft`

we have

`h=3\ ft`

substitute

`SA=8+(12)(3)=44\ ft^(2)`