Question

4) Find the following ratios
1) The ratio of perimeter to area of a square, having side 5,
2)The ratio of circumference of a circle to its area,​

Answer 1

Answer:

1. Perimeter of square = 4a

Area of square = a^2

given, a = 5

Therefore,

Perimeter of square : Area of square = 4a : a^2

= 4(5) : 5*5

= 20 : 25

= 4 : 5

2. circumference of a circle = 2πr

area of circle = πr^2

Therefore,

circumference of a circle : area of circle = 2πr : πr^2

= 2πr : π(r)(r)

= 2 : r