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ityeoboy2210
05.09.2019 •
Mathematics
Arectangle has an area that is numerically twice its perimeter. if the length is twice the width, what are its dimensions
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Ответ:
Width = 6 units
Length = 12 units
Step-by-step explanation:
First thing first :)
The area of a rectangle is given by the formula:
where
On the other hand, the perimeter of a rectangle is given by:
where
We know from our problem that the area of our rectangle is twice its perimeter, so:
We also know that its length is twice its width, so
. Let's replace that value in our previous equation and simplify:
Subtract
from both sides of the equation:
Factor
:
Equate both factor to zero:
A length can't be zero, so discard
and solve for the other one:
Know that we have the width of our rectangle, we can find its length:
We can conclude that the width of our rectangle is 6 units and its length is 12 units.
Ответ: