Question

if area of rectangle is 420m² and length is 2 less than twice the breadth. find the perimeter of rectangle​

Answer 1

area =420m²

let breadth be x

and then length =2x-2

area. = l×b

420m²= x × 2x-2

420+2 = 2x²

422/2 = x²

211=x²

x=√211

so length = 2√211-2