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Chapter 3: Q. 3.88 (page 368)

Find the length of a rectangle with: perimeter 30 and width 6.

Short Answer

Expert verified

The length of the rectangle is 9.

Step by step solution

01

Step 1. Given information

The perimeter of the rectangle is, P=30.

The width of the rectangle is, w=6.

We need to find the length, l of the rectangle.

02

Step 2. Use the formula for the perimeter of the rectangle.

The perimeter of the rectangle is, P=2(l+w).

We get

P2=l+wP2-w=ll=P2-w

03

Step 3. Substitute the values in l=P2-w.

We get

l=302-6=15-6=9

The length of the rectangle is 9.

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