Friday, June 5, 2015

What is the perimeter of the rectangle whose width is two third the length and the area is 96

Let the length of the rectangle be L and the width be
W.


Given that the width is 2/3 of the
length.


Then, we will write:


W
= (2/3)*L................(1)


Also, given that the area of
the rectangle is 96.


Then,


A =
w*L = 96..............(2)


Now we will substitute (1) into
(2).


==> W*L =
96


==> (2/3)*L * L =
96


==> (2/3)*L^2 =
96


Now we will multiply by
3/2.


==> L^2 =
96*3/2


==> L^2 =
144


Now we will take the root of both
sides;


==> L = 12
.


==> W = (2/3)L = (2/3)*12 =
8


==> W = 8.


Now we
will calculate the perimeter;


==> P = 2L + 2W = 2*12
+ 2*8 = 24 + 16 = 40.


Then, the perimeter of
the rectangle is 40 units.

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