Two circles touch each other externally. The distance between

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Two circles touch each other externally. The distance between their centre is 7 cm. If the radius of one circle is 4 cm, then the radius of the other circle is

1. 3.5 cm
2. 3 cm
3. 4 cm
4. 2 cm

Correct Option: B

n the basis of question we draw a figure of a two circles touch each other externally ,

Given , OƠ = 7 cm
We know that ,
OƠ = r₁ + r₂
⇒ r₁ + r₂ = 7
⇒ 4 + r₂ = 7
⇒ r₂ = 7 – 4 = 3 cm