Problema Solution
A plastering contractor charges $18 per square yard. What is the cost of plastering 60 feet of wall in a house with a 9 foot ceiling?
Answer provided by our tutors
we will assume that the plastering is done to the walls only
1 yard = 3 ft
1 yard^2 = 9 ft^2
A plastering contractor charges $18 per square yard or $18 per 9 ft^2 = $2 per ft^2
the plastering area = 60*9
the total plastering area = 540 ft^2
the total cost of the plastering is 540*2 = $1,080.