If two circles with centres P and Q have radii 3 cm and 5 cm rescpectively. The sum of their diameters is ___.

4 cm

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20 cm

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16 cm

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7 cm

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Solution

The correct option is C
16 cm

Radius of the first circle = 3 cm

Diameter = 2 x radius

= 2 x 3 = 6 cm

Radius of the second circle = 5 cm

Diameter = 2 x radius

= 2 x 5 = 10cm

Sum of the diamters = 6 + 10 = 16 cm

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