A cylindrical pillar is 50 , cm in diameter a | vedclass

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(D) Given: Diameter of the cylindrical pillar $= 50 \, cm = 0.5 \, m$.Radius $(r) = \frac{0.5}{2} = 0.25 \, m$.Height $(h) = 3.5 \, m$.Curved Surface

Vedclass · Accepted Answer

$Rs. \, 68.75$

Vedclass · Answer

(D) Given: Diameter of the cylindrical pillar $= 50 \, cm = 0.5 \, m$.Radius $(r) = \frac{0.5}{2} = 0.25 \, m$.Height $(h) = 3.5 \, m$.Curved Surface Area $(CSA)$ of the cylinder $= 2 \pi rh$.$CSA = 2 	imes \frac{22}{7} 	imes 0.25 	imes 3.5 \, m^2$.$CSA = 2 	imes \frac{22}{7} 	imes 0.25 	imes \frac{35}{10} = 2 	imes 22 	imes 0.25 	imes 0.5 = 5.5 \, m^2$.Cost of painting per $m^2 = Rs. \, 12.50$.Total cost of painting $= 5.5 	imes 12.50 = Rs. \, 68.75$.

$A$ cylindrical pillar is $50 \, cm$ in diameter and $3.5 \, m$ in height. Find the cost of painting the curved surface of the pillar at the rate of $Rs. \, 12.50$ per $m^2$. $\left[ \text{Assume } \pi = \frac{22}{7} \right]$

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