alleryA sealed tin has r=7 cm and h=3 cm. Find its full outer area; π=22/7.
A660 cm²
B220 cm²
C440 cm²
D308 cm²
Answer & Solution
Correct answer: C. 440 cm²
Total area = 2πr(r+h) = 2 × (22/7) × 7 × 10 = 440 cm².
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