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What is the radius of the circle whose area is equal to the sum of the areas of two circles whose radii are 20 cm and 21 cm?
  • a)
    27m
  • b)
    28m
  • c)
    29m
  • d)
    25m
  • e)
    15m
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
What is the radius of the circle whose area is equal to the sum of the...
πR² = πr1² + πr2²
πR² = π(r1² + r2²)
R² = (400 + 441)
R = 29
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Most Upvoted Answer
What is the radius of the circle whose area is equal to the sum of the...
C
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What is the radius of the circle whose area is equal to the sum of the areas of two circles whose radii are 20 cm and 21 cm?a)27mb)28mc)29md)25me)15mCorrect answer is option 'C'. Can you explain this answer?
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