The radius of a circle is increased by 1 cm. Then the ratio of new circumference to the new diameter is

π : 3

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π : 2

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π : 1

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π : \frac{1}{2}

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Solution

The correct option is C $π : 1$
New radius = $(r + 1) c m$
Ratio = $2 π (r + 1) : 2 (r + 1) = π : 1$

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The radius of a circle is increased by 1 cm. Then the ratio of new circumference to the new diameter is

The correct option is C π:1New radius = (r+1) cmRatio = 2π(r+1):2(r+1)=π:1

The correct option is C $π : 1$
New radius = $(r + 1) c m$
Ratio = $2 π (r + 1) : 2 (r + 1) = π : 1$