Two circles have radius 5 and 26. The smaller circle passes through centre of the larger one. What is the difference between the lengths of the longest and shortest chords of the larger circle that are tangent to the smaller circle?

Two concentric circle of radii 13cm and 12 cm. What is the length of the chord of the larger circle which is tangent to the smaller circle?

If the length of the longest chord of a circle is 22 cm. Find the radius of a circle.

Two concentric circles are such that the smaller divides the larger into two regions of equal area.If the radius of the smaller circle is 2, then the length of the tangent from any point 'P'on the larger circle to the smaller circle is

Two concentric circles are of radii 5cm and 3cm respectively. Find the length of the chord of the larger circle which touches the smaller circle.

The area of a circle is proportional to the square of its radius. A small circle of radius 3 cm is drawn within a larger circle of radius 5 cm. Find the ratio of the area of the annular zone to the area of the larger circle. (Area of the annular zone is the difference between the area of the larger circle and that of the smaller circle).

Given a circle with centre O and radius 2.5cm, what is the length of the longest chord of the circle

The length of the longest chord of the circle is 17 cm, find the radius of the circle.