Q. The curved surface area of a cone is 154 cm² and its slant height is 7 cm. Using π=22/7, the radius is:
✅ Correct Answer: (C)
7 cm
Explanation: 154=(22/7)×r×7=22r ⇒ r=7 cm.
Explanation by: Krishna Sharma
154=(22/7)×r×7=22r ⇒ r=7 cm.