Planning & EstimatingQuestion 593 of 700
A roof has 2,400 square feet of surface area. Adding 15 percent for waste, how many roofing squares should be ordered (1 square = 100 sq ft)?
a.28 squares
b.24 squares
c.27 squares
d.2,760 squares
Explanation
Add waste: 2,400 x 1.15 = 2,760 sq ft. Divide by 100: 27.6 squares, round up to 28 (a). Option (b) ignores the waste factor. Option (c) rounds down instead of up. Option (d) leaves the answer in square feet.
Practice all 700 questions free — no signup required.
Related questions on this topic
- A concrete masonry wall is 10 ft high and 30 ft long, built with standard 8x8x16 CMU. Using the rule of 1.125 blocks per square foot of wall face, what is the MINIMUM number of blocks (before waste)?
- A brick veneer wall is 9 ft high and 24 ft long. Using about 6.75 modular bricks per square foot of wall face, what is the APPROXIMATE brick count (before waste)?
- A room is 12 ft by 16 ft with 8 ft ceilings. You will hang 4x8 gypsum board on all four walls AND the ceiling, ignoring openings and waste. What is the MINIMUM number of full sheets?
- A ceiling is 30 ft by 40 ft and will receive two coats of paint. If coverage is 400 sq ft per gallon per coat, what is the MINIMUM number of gallons to buy?
- A floor is 14 ft by 16 ft and will be covered with 12-inch by 12-inch tiles. Adding 10 percent for waste, what is the MINIMUM number of tiles to order?
- A room is 15 ft by 18 ft and will get laminate flooring. Each box covers 20 sq ft, and you add 10 percent for waste. What is the MINIMUM number of full boxes to buy?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB General Building (B) Trade Examination · How we review