Exams › SSC CGL (Prelims) › General

Two circles with radii 7 cm and 3 cm have centers 12 cm apart. How many common tangents can be drawn?

1. 1
2. 2
3. 3
4. 4

Correct answer: 4

Solution

The sum of radii is 7 + 3 = 10 cm, while the distance between centers is 12 cm. Since 12 > 10, the circles are separate and non-intersecting. Two separate circles have 4 common tangents.

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