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Length and breadth of rectangle is in the ratio of 4 : 3. If the radius of the two circles is equal to length of the rectangle and other is equal to the diagonal of rectangle and difference between areas is 441π cm2, then find the perimeter of the rectangle?
  • a)
    84 cm
  • b)
    78 cm
  • c)
    98 cm
  • d)
    56 cm
  • e)
    72 cm
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Length and breadth of rectangle is in the ratio of 4 : 3. If the radi...
Let, length, and breadth of the rectangle be 4x and 3x cm respectively.
Diagonal of rectangle =
Given,
π(5x)2 − π(4x)2 = 441π
9x2 = 441
The perimeter of the rectangle = 2(4 × 7 + 3 × 7)=98 cm
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Length and breadth of rectangle is in the ratio of 4 : 3. If the radius of the two circles is equal to length of the rectangle and other is equal to the diagonal of rectangle and difference between areas is 441π cm2, then find the perimeter of the rectangle?a)84 cmb)78 cmc)98 cmd)56 cme)72 cmCorrect answer is option 'C'. Can you explain this answer?
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