Question

If lenght of rectangle is 3 time its breath find the expression for its perimeter and area given that the breadth is b cm. Solution

Answer 1

let breadth= B
and length = 3B

perimeter of rectangle = 2(l+b)
= 2(B+3B)
= 2(4B)
= 8B

area of rectangle = l*b = 3B*B = 3B^2

I hope it will help you