Posted by **Brandy** on Friday, November 5, 2010 at 8:51pm.

A homeowner wishes to insulate her attic with fiberglass insulation to conserve energy. The insulation comes in 40cm wide rolls that are cut to fit between the rafters in the attic. If the roof is 6m from peak to eave and the attic space is 2cm high at the peak, how long does each of the pieces of insulation need to be?

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