3.5cm
7cm
14cm
28cm
32cm
Correct answer is C
Curved surface area of a cylindrical tin = 2πrh
∴
2 \times \frac{22}{7} \times 8 \times h = 704
h = \frac{704 \times 7}{2 \times 22 \times 8}
h = 14cm
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