Question

Two circle touch each other radii 5.5 and 3.3 externally. What is the distance between their centres

Answer 1

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Radii of first circle = 5.5

Radii of second circle = 3.3

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Circumference of 1st circle

= $2×\pi×r$

= $2×3.14×5.5$

= 34.54

Circumference of 2nd circle

= $2×\pi×r$

= $2×\pi×3.3$

=20.724

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The distance between their centres is

= 34.54 - 20.724

= 13.816

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Answer 2

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Radii of first circle = 5.5

Radii of second circle = 3.3

_________________________________

Circumference of 1st circle

= 2 × 3.14 × 5.5

= 34.54

Circumference of 2nd circle

= 2 × 3.14 × 3.3

=20.724

___________________________________

The distance between their centres is

= 34.54 - 20.724

= 13.816

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