If the area of a circle of radius r is equal to the curved surface area of a cone with radius r1 and slant height l, then the value of r1 in terms of r and l is:

If the area of a circle of radius r is equal to the curved surface are

1.	If the area of a circle of radius r is equal to the curved surface area of a cone with radius r1 and slant height l, then the value of r1 in terms of r and l is:
Answer» If the area of a circle of radius r is equal to the curved surface area of a cone with radius $r_{1}$ and slant height l, then the value of $r_{1}$ in terms of r and l is: