Problema Solution
You plan to stain the wooden deck attached to your house. The deck measures
16 feet by 11 feet. A quart of stain will cost $9.50 and will cover 45feet squared. How many quarts of stain do you plan to buy.
Answer provided by our tutors
we will assume the deck has a rectangular shape with dimensions:
l = 16 ft the length
w = 11 ft the width
the area of the deck is: A = length*width
A = l*w
A = 16*11
A = 176 ft^2
1 quart = 45 ft^2
let x = the quarts we need to cover 176 ft^2
since the quarts of paint is directly proportional to the area we have:
1 : 45 = x : 176
by solving we find:
x = 3.91 qt approximately
click here to see the step by step solution of the equation:
3.91 quarts of paint are needed to cover the deck.