Find the radians and degrees, the angle subtended at the centre by an arc whose length is 15cms, if the radius of the circle is 25cms.

Find the length of the longest chord of the circle of radius 5.2 cm.

Find the length of an arc of circle which subtends an angle of 108^@ at the centre, if the radius of the circle is 15cms.

In the adjoining figure, Point O is the centre of the circle. Length of chord AB is equal to the radius of the circle. Find m(arc AB)

In the adjoining figure, Point O is the centre of the circle. Length of chord AB is equal to the radius of the circle. Find m(arc ACB)

Select and write the correct answer from the given alternatives in each of the following:The length of an arc of a circle which subtends an angle of 108^@ at the centre,if the radius of the circle is 15cm is

Two arcs of the same length subtend angles of 60^@ and 75^@ at the centres of the circles.What is the ratio of the radii of the two circles?

If the area of sector and length of the arc of the sector are 54 cm^(2) and 18 cm respectively, then the radius of the circle is