# Hard SAT Math Question 21 — Video Explanation | 1600.now

Source: https://1600.now/hard/21

---

21

One bucket of paint costs $27 and can cover $64$ square feet of a house. A given house has a total surface area of $m$ square feet. Which equation accurately represents the total cost, $t$, in dollars, of paint needed to cover the house twice?

A

$t = \frac{27m}{64}$

B

$t = \frac{27m}{32}$

C

$t = 64\left(\frac{m}{54}\right)$

D

$t = 64\left(\frac{m}{27}\right)$