Question

Kelly has a rectangular fish aquarium that measures 18 inches long, 8 inches wide, and 12 inches tall. a. What is the maximum amount of water the aquarium can hold?

1728 in ^3

144 in ^3

216 in ^3

1728 in ^2
2
If Kelly wanted to put a protective covering on the four glass walls of the aquarium, how big does the cover have to be?

1728 in^2

406 in^2

5 in^2

624 in^2

Untitled Option 5

I already answer the first question. I just need help on the second one.

Answer 1

@Utterly_Confuzzled

Answer 2

Remember the SA formula we used in the last question? We're going to use that again!

Answer 3

But slightly modified

Answer 4

Alrighty :3

Answer 5

So we do...

Answer 6

Since you don't need the top or bottom covered, you can completely leave out 2lw
So in this case, SA= 2lh + 2wh

Answer 7

And l=18, w=8, h=12

Answer 8

Can you solve it from there?

Answer 9

I think so.

Answer 10

So 18 x 12 x 2 + 8 x 12 x 2?

Answer 11

Right!

Answer 12

Ok let me solve that now.

Answer 13

Okay! Take your time!

Answer 14

So the answer is D?

Answer 15

Right!

Answer 16

Thank you!

Answer 17

You're Welcome!