Aquart of stain covers 100 square feet. how many quarts should you buy to stain the ramp? (assume you do not have to stain the bottom of the ramp.)

270.6  or 2.7 Quart or about 3 quart of stain.

Step-by-step explanation:

From the given example, we recall the following,

A quart of stain covers (100) square feet

Let The 30 in. be  converted to 2.5 feet

Then,

The sides:

(30 x 2.5) ÷ 2 = 37.5

37.5 + 37.5 = 75

For the Back:

2.5 x 6 = 15

Top:

30.1 x 6 = 180.6

180.6 + 75 + 15 = 270.6  or 2.7

Therefore, about 3 quarts of stain is needed