The radius of two concentric circles are 9 cm and 12 cm respectively. Find
the area of the circular path between the two circles.
Answers
Answer:
197.82 cm²
Step-by-step explanation:
Given:
Radius of inner circle = 9cm
Radius of outer circle = 12cm
Find :
Area of circular path between them.
Ans :
1. Area of inner circle = πr²
= 22/7 * 9cm * 9cm
= 3.14 * 81 cm²
= 254.34 cm²
2. Area of outer circle= πr²
= 3.14 * 12cm * 12cm
= 452.16 cm²
3. Area of circular path = Area of outer circle - Area
of inner circle
= 452.16 cm² - 254.34 cm²
= 197.82 cm²
Formula used:
Area of circle = πr²