The radius of the two circles is 12 cm and 5 cm. The distance between their centres is 25 cm. What is the length of the direct common tangent?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 24 cm.
Direct common tangent = √[252 - (12 - 5)2]
= √(625 - 49)
= √576
= 24 cm