Arc lenght of `15pi` cm makes an angle of `(3pi)/4` radian. Find the angle of radius of the circle? A) 15cm B)20cm c)25cm D)30cm

An arc of length 20 pi cm subtends an angle of 144o at the centre of a circle.Find the radius of the circle.

The radius of the circle whose are of length 15 pi cm makes an angle of 3 pi/4 radius at the centre is 10cm b.20cm c.11(1)/(4)cm d.22(1)/(2)cm

If the area of a sector of a circle bounded by an arc of length 5pi cm is equal to 20pi\ c m^2 , then the radius of the circle is (a) 12 cm (b) 16 cm (c) 8 cm (d) 10 cm

An arc of length 15cm subtends an angle of 45o at the centre of a circle.Find in terms of pi ,the radius of the circle.

If in any triagnle a=13cm, b= 14 cm and c = 15cm, find the inradius of the circle :

From a point Q, the length of the tangent to a circle is 24cm and the distance of Q from the centre is 25cm. The radius of the circle is (A) 7cm(B)12cm(C)15cm(D)24.5cm

If the length of a chord of a circle is 16 cm and is at a distance of 15 cm from the centre of the circle, then the radius of the circle is 15 cm (b) 16 cm (c) 17 cm (d) 34 cm

A metallic sphere of radius 5cm is melted to make a cone with base of the same radius. What is the height of the cone? (a) 5cm10cm, (c) 15cm (d) 20cm

If the piece of wire 25 cm long is bent into an arc of a circle subtending an angle of 75^(@) at the centre , then the radius of the circle ( in cm ) is :

If in a circle of radius 21cm, an arc subtends an angle of 56o at the centre,the length of the arc is (a) 15.53cm (b) 16.53cm (c) 18.53cm (d) 20.53cm