# math

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a carpet for a small room measuring 4 ft by 7.5 ft cost \$120 how much would it cost for a carpet (with the same price per square foot) for a bigger room that measures twice as long and three times as wide

• math -

cost per square foot = 120/30 = \$4.00 per square foot
twice 7.5 = 15
three times 4 = 12
new area = 15(12) = 180

cost = 180(4) = \$720

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