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A rectangle has perimeter 78 cm and length 34 cm. What is its? width?

User Folletto
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1 Answer

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The perimeter of a rectangle is twice the sum of the dimensions:


2p = 2(w+l)

We know two of the three unkowns, so we can solve for w:


78 = 2(w+34) \iff 78 = 2w+68 \iff 10=2w \iff w=5

User AFraser
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