The radii of two circles are 5cm and 12cm. The area of a third circle is equal to the sum of the area of the two circles. The radius of the third circle is :
A13 cm
B21 cm
C17 cm
D30 cm
A13 cm
B21 cm
C17 cm
D30 cm
Related Questions:
In the figure, O is the centre of the circle and A, B, C are points on it. <OAC=22°, <OBC= 42°. The measure of <BOA is :