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The curved surface area and the slant height of a right circular cone are 858 cm2 and 13 cm respectively. Find its diameter (in cm). |
42 cm 40 cm 44 cm 41 cm |
42 cm |
The curved surface area of right circular cone = \(\pi \)rl \(\frac{22}{7}\)× r × 13 = 858 r = \(\frac{858 × 7}{22 × 13}\) r = 21 Diameter = 2r = 2 × 21 = 42 cm |
