Areas related to Circles ncert solutions Chapter 12 Exercise 12.1 Question 1
1. The radii of two circles are 19 cm and 9 cm respectively. Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles.
Solution:
r1 = 19 cm
r2 = 9 cm
Circumference of first circle =
cm
Circumference of second circle =
cm
Sum of circumferences =
cm
We want to find radius of circle with circumference equal to
cm
Therefore,
cm
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