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The diameter of a circle is 105 cm less than the circumference. What is the diameter of the circle?

44 cm
46 cm
48 cm
49 cm

Correct Answer: 49 cm

Explanation:

∵ πd-d = 105 cm
⇒ (π -1 ) d = 105 cm
⇒ [(22/7)-1] x d = 105 cm
∴ d = (7/15) x 105 cm = 49 cm

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