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Mathematics 7 Online
OpenStudy (anonymous):

Your friend has a triangle-shaped deck. He recently needed to refinish the deck. It took him precisely 1.5 gallons of water sealant to reseal the deck. Each gallon of water sealant will cover 30 square feet. You have a deck that is the same shape but is 2 times longer on each side. How many gallons of water sealant will you need on your deck?

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