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Question
The circumference of a circle is equal to the perimeter of a square. The side of the square is 33 cm. What is double the diameter of the circle?
Options
42 cm
21 cm
10.5 cm
None of these
MCQ
Solution
None of these
Explanation:
Circumference of circle
= Perimeter of square
= (4 × 33) cm
∴ 2πr = 4 × 33
⇒ r = `(4 xx 33 xx 7)/(2 xx 22)` = 21 cm
∴ 2 × diameter = 2 × 2 × 21 = 84 cm
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Mensuration - Area and Volume (Entrance Exam)
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