English, asked by gaursushma49, 5 months ago

find the area of a circular ring whose external and internal radio are 21 cm and 14 cm respectively

Answers

Answered by tanejakca

1

Area of ring = pi (R^2-r^2)
22/7 (21+14)(21-14)
22/7 x35x 7
22x35 = 770 square m

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