The radius of the circle whose arc of length \[15cm\] makes an angle of 3/4 radian at the centre is [Karnataka CET 2002]

The radius of the circle whose arc of length \[15cm\] makes an angle o

1.	The radius of the circle whose arc of length \[15cm\] makes an angle of 3/4 radian at the centre is [Karnataka CET 2002]
A.	\[10cm\]
B.	\[20\,cm\]
C.	\[11\frac{1}{4}cm\]
D.	\[22\frac{1}{2}cm\]
Answer» C. \[11\frac{1}{4}cm\]