Question

The difference between circumference and diameter of a circle is 135 cm. Find the radius of a circle?

Answer 1

If r is the radius of a circle then the diameter and circumference of the circle will be 2r and 2πr respectively. According to the question,
2πr-2r=135
or, r(2π-2)=135
or, r=135/{(2×22/7)-2}
or, r=135/(44/7-2)
or, r=135{(44-14)/7}
or, r=135×7/30
or, r=31.5 cm Ans.

Answer 2

this is solved answer