Question

find the perimeter of rectangular field whose length is 4 times its width and which has area equals to 20736 square metre ​

Answer 1

Answer:

let the width of rectangle=X

then the length of rectangle=4x

area of rectangle=l×b

20736=x×4x

20736=4x2

√20736=4x

144=4x

X=144/4

x=36

width=X=36

length=4x=4×36=144

perimeter = 2(l+b)

=2(36+144)

=2*180

=360