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 Class 7 Mathematics Length, Perimeter and Area: Surface Area

A closed cylindrical tank was made using metal sheets. The diameter of the tank was 1.4m and its height was 2m. How many square metres of the metal sheet was used to make the tank? (Take #pi=22/7#)
A. 3.08
B. 8.8
C. 10.4
D. 11.88

 (3m 50s)
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