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प्रश्न
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?
विकल्प
42 cm
21 cm
10.5 cm
None of these
MCQ
उत्तर
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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