Question

lenth of rectangle is 7 times its breadth.its area is 1792cm^2 .find the perimeter of the rectangle​

Answer 1

let b=x

l=7x

l×b=1792

7x×x=1792

7x^2=1792

x^2=1792/7

x^2=256

x=√256

x=16

b=16 and l=16×7=112

permeter=2(l+b)

2(112+16)=2×128

=256cm