The area of a rectangle is 525 sq cm. the ratio of the length to the width is 7:3. find the length and width.
1 answer:
Suppose the length is 7x, the width is then 3x
7x*3x=525
21x²=525
x²=25
x=5
so the length is 7*5=35, and the width is 3*5=15
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