Given, Radius of cone, r=7cm and Height, h=24cm.
To find slant height l:
We know, l2=r2+h2
⟹ l2=72+242
⟹l2=625
⟹l=25cm.
Therefore, curved surface area of cone is =πrl
=227×7×25
=22×25
=550cm2.
Hence, the curved surface area of cone is 550cm2.
Thus, option B is correct.