Two circles of radii 5.5 cm and 4.2 cm touch each other externally. The distance between their centres is
A. 1.3 cm
B. 4.85 cm
C. 9.7 cm
D. 23.1 cm
A. 1.3 cm
B. 4.85 cm
C. 9.7 cm
D. 23.1 cm
Best answer
Answer: C. 9.7 cm
For circles touching externally, the distance between the centres is the sum of the radii: \(5.5 + 4.2 = 9.7\) cm.
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