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telo118 [61]
3 years ago
9

The length of a rectangle envelope is 2 1/2 times its width. A plastic band surrounds the front and back of the envelope to secu

re it as shown in the picture. The plastic band is 39 3/8 inches long. Find the length and width of the envelope.
Mathematics
1 answer:
Andreas93 [3]3 years ago
5 0

<u>Answer</u>:

Length of the envelope = 14

Width of the envelope = 5.6

<u>Step-by-step explanation:</u>

Let the width of the rectangle be  x

Then the length of the rectangle will be 2\frac{1}{2} \times x

Also the length of the plastic band to cover the  front and back of the envolpe =  39\frac{3}{8}

To cover one side th band required is

=>\frac{39\frac{3}{8}}{2}

=>\frac{\frac{315}{8}}{2}

=>\frac{\frac{315}{8}}{2}

=>{\frac{315}{16}

=>39.4

We know that the perimeter of the rectangle is

=> 2( L + B) = {\frac{39.4}{2}

=> 2( 2\frac{1}{2} \times x + x) = 19.7

=> 2( \frac{7}{2}x) = 19.7

=>  3.5x = 19.7

=> x = \frac{19.7}{3.5}

=>  x = 5.6

Now length of the envelope =

=>  2\frac{1}{2} \times x

=>  2.5 \times 5.6

=> 14

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