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The curved surface area and the height of a right circular cylinder are 660 cm2 and 10 cm respectively. Find its diameter (in cm). |
20 cm 19 cm 21 cm 22 cm |
21 cm |
The curved surface area of right circular cylinder = 2\(\pi \)rh 2\(\pi \)r × 10 = 660 r = \(\frac{660 × 7}{2 × 10 × 22}\) r = 10.5cm Diameter = 2r = 2 × 10.5 = 21 cm |
