Question

Mr. Chen is painting one wall of a room in his attic. He needs to detemine the area of the wall so he will know how much paint he will buy. The drawing below shows the dimensions of the wall.







Part A: Given the drawing, what is the area of the wall?



The area of the wall is

square feet.


Part B: If one quart of paint will cover 22 square feet, how many whole quarts will Mr. Chen need to buy?



He will need to buy
whole quarts.

Answer 1

Area of the figure

= (area of rectangle) + (area of triangle)

= (8 × 10) + (½ × 4 × 8)

= 80 + 16

= 96

Area = 96ft²

Quarts of paint needed

= 96/22

= 48/11

= 4.36

Mr. Chen will have to buy 5 quarts of paint.