Apublic library has an aquarium in the shape of a rectangular prism. the base is 6 feet by 2.5 feet. the height is 4 feet. how many square feet of glass were used to build the aquarium? the top is open. the answer is 83, but i need the formula

6 * 2.5 = 15 That’s the area of the base

2.5 * 4 = 10
10 * 2 = 20
That’s the area of the 2 smaller sides

6 * 4 = 24
24 * 2 = 48
That’s the area of the 2 larger sides

Then you add all the dimensions together.

15+20+48 = 83.

So, the final equation is (6*2.5) + 2(2.5*4) + 2(6*4) = 83