Question

find the perimeter of a rectangular field whose length is 4 times its widthand which has an area equal to 20736 sq.cm

Answer 1

Let the width be x ,then length is 4x.
We know,
Area of rectangle=I*b
Therefore,area=4x*x
20736=4x"2
144=2x
x=72.
Therefore ,perimeter=2(I+b)
=2(4"72+72)
=2(288+72)
=2*360=720

Answer 2

Answer:

Step-by-step explanation:

Let the width be =X

Length=4X

Area=l × b

20736=4X × X

20736=4X2

20736/4=X2

5184=X2

X=72

Perimetr=2l+2b

=2X+2×4X

=2×5X

=10 ×X

=720

CHEERS DONE