The radii of two concentric circles are 15cm and 13cm respectively, then the area of the annular ring is
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176 cm² is area of ring if The radii of two concentric circles are 15cm and 13cm respectively
Step-by-step explanation:
The radii of two concentric circles are 15cm and 13cm respectively
Area of outer circle = π 15²
Area of inner circle = π 13²
Area of ring = π 15² - π 13²
= π ( 225 - 169)
= π * 56
using π = 22/7
= (22/7) * 56
= 22 * 8
= 176 cm²
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