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Ex 9.2, 15 - Chapter 9 Class 7 Perimeter and Area
Last updated at July 4, 2023 by Teachoo
Ex 9.2
Ex 9.2, 1 (a)
Ex 9.2, 1 (b) Important
Ex 9.2, 1 (c)
Ex 9.2, 2 (a) Important
Ex 9.2, 2 (b) Important
Ex 9.2, 2 (c)
Ex 9.2, 3
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Ex 9.2, 9 Important
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Ex 9.2, 11
Ex 9.2, 12 Important
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Ex 9.2, 14
Ex 9.2, 15 You are here
Ex 9.2, 16 Important
Ex 9.2, 17 Important
Transcript
Ex 9.2, 15 Find the circumference of the inner and the outer circles, shown in the adjoining figure? (Take π = 3.14) Outer circle Radius of outer circle = R = OB = 19 m Circumference of outer circle = 2𝜋R = 2 × 3.14 × 19 = (2 × 314 × 19)/100 = 𝟔𝟐𝟖/𝟏𝟎𝟎 × 19 = 11932/100 Inner circle Radius of inner circle = 19 − 10 = 9 cm Circumference of inner circle = 2𝜋r = 2 × 3.14 × 9 = 2 × 314/100 × 9 = 𝟔𝟐𝟖/𝟏𝟎𝟎 × 9 = 5652/100 = 56.52 m ∴ Circumference of outer circle is 119.32 m & Circumference of inner circle is 56.52 m
