Question : The total surface area of a cylinder whose radius is 6 cm and height is 8 cm is: (Use $\pi=\frac{22}{7}$)
Option 1: 528 cm2
Option 2: 575 cm2
Option 3: 658 cm2
Option 4: 625 cm2
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Correct Answer: 528 cm 2
Solution : Given, the radius of the cylinder, $r$ = 6, height, $h$ = 8 The total surface of the cylinder $= 2\pi r(r+h)$ $=2\times \frac{22}{7}\times 6(6+8)$ $=2\times \frac{22}{7}\times 6\times 14$ $=2\times 22\times6\times 2$ $=528$ cm 2 Hence, the correct answer is 528 cm 2 .
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