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प्रश्न
If the area of a circle is 154 sq. cm, then what is the circumference of the circle?
पर्याय
40 cm
44 cm
54 cm
59 cm
MCQ
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उत्तर
44 cm
Explanation:
πr2 = 154
⇒ r2 = `(154 xx 7)/22` = 49
⇒ r = `sqrt49` = 7 cm
∴ Circumference of circle = 2πr
= `2 xx 22/7 xx 7`
= 44 cm
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Mensuration - Area and Volume (Entrance Exam)
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