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1. |
What is the total surface area (in sq cm) of a hollow cylinder open at both ends, if its length is 22 cm, external radius is 7 cm and thickness is 1 cm? (Take π = 22/7) |
A. | 1879.43 |
B. | 3758.86 |
C. | 939.715 |
D. | 2819.145 |
Answer» B. 3758.86 | |