Question

17. The areas of two concentrie circles are 962 5 com and 1885 cm respect the
of the ring
Hint. R2 = 962.5 = = 306.25 = R = 306.25 = 175 cm
= 441 = B = 441 = 21 cm
Find (R1- R2)
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Answer 1

Answer:

Area of bigger circle =πR²

1386 = 22/7 × R²

R² = 1386×7/22

R² = 441

R = 21cm

Area of smaller circle = πr²

962.5 = 22/7 × r²

r² = 962.5 ×7/22

r² = 306.25

r = 17.5cm

Width of ring = 21-17.5

= 3.5cm

Step-by-step explanation:

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Answer 2

Answer:

R² = 441. R = 21cm. Area of smaller circle = πr² 962.5 = 22/7 × r² r² = 962.5 ×7/22 r² = 306.25 r = 17.5cm. Width of ring ...