railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Mensuration Solid Figures
The total surface area of a solid right circular cone is 6930 cm2. Its curved surface area is \( {4 \over 5}\) its total surface area. What is the diameter (in cm) of the base of the cone? (Take \(\pi = {22 \over 7}\))
1
14
2
42
3
21
4
56