Question

the difference between circumference and diameter of a circle is 105 cm. Find the radius of the circle.

Answer 1

Circumference of circle=2*22/7*r
Diameter = 2r
2r(22/7-1) = 105
2r (15/7) = 105
r = 105×7/2×5
= 49/2
=24.5 cm.
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