Question

The length of a rectangle is 10 metres more than Its breadth l.if the perimeter of the rectangle is 80metres find the dimensions of the rectangle

Answer 1

Let the breadth be x Then length is x+10 Given, perimeter is 80m Perimeter=2×(l+b) 80=2×(x+10+x) 80/2= 2x+10 40-10 = 2x 30 = 2x x = 15 Therefore..breadth is 15m Length is x+10 = 15 + 10 =25.

Answer 2

length (l) = b + 10
perimeter of rectangle = 2(l+b) = 80 m
2(b+10 +b) = 80 m
4b + 20 = 80 m
4b = 60 m
b = 60/4 = 15 m
l = b + 10 = 15 + 10 = 25 m