A cylindrical tank has a radius of 7 cm and a height of 10 cm. Calculate the total surface area of the tank. [Take π = 22/7]
A748 cm²CORRECT
B440 cm²
C374 cm²
D880 cm²
GCEMathematicsMensuration2021
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Why the answer is A, and why the others tempt you.
Total surface area = 2πr(h + r) = 2 × (22/7) × 7 × (10 + 7) = 2 × 22 × 17 = 748 cm². Option B gives only the curved surface area (2πrh), while option C gives only one circular base plus the curved surface, making option A the only complete and correct answer.
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