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Three circles touch each other externall...

Three circles touch each other externally. The distance between their centre is 3 cm, 4 cm and 5 cm. Find the radii of the circles :

A

3cm, 2cm, 4cm

B

3cm, 4cm, 1cm

C

1 cm, 2.5 cm, 3.5 cm

D

1 cm, 2 cm, 4 cm

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The correct Answer is:
A
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