Question

If the radius of a circle is increased by one unit, what is the ratio of the circumference to its diameter.

Answer 1

let the radius be r
when radius is increased by 1 ,the new radius is 'r+1'

circumference of a circle=2πr
circumference of circle with radius r+1 is = 2π(r+1)


the new diameter is 2(r+1)

ratio of the circumference to the diameter

2π(r+1)/2(r+1)
=π/1=22/7/1
=22/7
the ratio is 22:7


hope you will understand