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A reroof area requires 14,720 sf of rigid insulation. Boards are 4 ft by 8 ft, and the order includes 5 percent waste. How many boards are needed?

Correct Answer

A) 483 boards

One board covers 32 sf. Adjusted area is 14,720 x 1.05 = 15,456 sf. 15,456/32 = 483 boards. Other choices omit waste, round to an arbitrary bundle count, or use a larger allowance.

Answer Options
A
483 boards
B
460 boards
C
500 boards
D
516 boards

Why This Is the Correct Answer

One board covers 32 sf. Adjusted area is 14,720 x 1.05 = 15,456 sf. 15,456/32 = 483 boards. Other choices omit waste, round to an arbitrary bundle count, or use a larger allowance.

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