Homework Help: math

Posted by arvi on Monday, February 18, 2013 at 8:41am.

a tailor had 9m of cloth. after making a tablecloth and 4 cushion covers, she had 90 cm of cloth left. if she used twice as much coth to make each cushion cover as the tablecloth, find the lenght of cloth she used to make each cushion cover

math - Jeff, Monday, February 18, 2013 at 9:05am
Convert the 9m of cloth to cm = 900 cm to start with.

She has 90 cm of cloth left so she used
900 cm - 90 cm = 810 cm of cloth
Let X = cloth for tablecloth
Let 2X = cloth for each cushion cover.

The equation would be:
810 = X + 4 * 2x
810 = X + 8X
810 = 9X
X=90cm
2X=2(90cm) = 180 cm
So the tablecloth = 90 cm, and each cushion cover is 180 cm.

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