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# A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the piller at the rate of Rs.10 per sq m.

 A) Rs.50 B) Rs.68 C) Rs.98 D) Rs.55

 D) Rs.55

Curved surface area = $$\Large 2 \pi rh$$

= $$\Large 2 \times \frac{22}{7} \times 0.25 \times 3.5$$

Therefore, Cost of painting 5.5 sq m = $$\Large 10 \times 5.5$$ = Rs.55

Part of solved Volume and surface area questions and answers : >> Elementary Mathematics >> Volume and surface area

Similar Questions
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3). The diameter of base of a right circular cone is 7 cm and slant height is 10 cm, then what is its lateral surface area?
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6). The radius of the base of a right circular cone is doubled. To keep the volume fixed, the height of the cone will be
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