NIELIT 2017 OCT Scientific Assistant A - Section A: 5

Question

Line $AB$ is $24$ metres in length and is tangent to the inner one of the two concentric circles at point $C.$ Points $A$ and $B$ lie on the circumference of the outer circle. It is known that the radii of the two circles are integers. The radius of the outer circle is

• A. $13$ m
• B. $5$ m
• C. $7$ m
• D. $4$ m

Answer 1

Option A. 13 m

Inner circle radius would be 5 m

13^2 = 12^2 + 5^2