# Math

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1 litre can of paint covers 11m squared. How many cans of paint would you need to cover a perfectly square ceiling that has a side length of 5.2 m?

If paint caosts \$29.95 per can and there is a 12% tax. How much would it cost to paint the ceiling?

• Math -

Hold it! im going to try this myself but i want someone to check if i did it right:

5.2 x 5.2 = 27.04

11 x 3= 33
You would need 3 cans of paint.

27.04 x 3 = 81.12

ok now im stuck... how do you do this part::If paint caosts \$29.95 per can and there is a 12% tax. How much would it cost to paint the ceiling?

• Math -

5.2 * 5.2 = 27.04 square meters

27.04 / 11 = 2.46 = 3 cans of paint

(3 * 29.95) * 1.12 = ?

• Math -

OOPS oh so is this how you do it:: 29.95 x 3= 89.85x 1.12 = \$100.632

i just have one question: where did the 1.12 come from?

• Math -

1.12 = 112%

• Math -

Nope it would be 1.12=12%
if you are going to follow this way
29.95 x 0.12=3.594
so look here 29.95 + 3.594=33.544
29.95 x 1.12 =33.544