☆Any Genius here who can solve this question in 3 minutes.☆ The diameter of the base of a cylindrical pillar is 40 cm and its height is 3 cm. Find the cost of whitewashing its curved surface area at the rate of Rs. 6.50 per square centimetre.
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Radius of base=> 40/2= 20
Height of cylinder=> 3 cm
CSA=> 2πrh
2×22/7×20×30= 2640/7=> 377.1 cm
*Cost of whitewashing 1 cm= Rs. 6.50
*Cost of whitewashing 377.1 cm= 377.1× 6.50=>2451.15 Ans
Height of cylinder=> 3 cm
CSA=> 2πrh
2×22/7×20×30= 2640/7=> 377.1 cm
*Cost of whitewashing 1 cm= Rs. 6.50
*Cost of whitewashing 377.1 cm= 377.1× 6.50=>2451.15 Ans
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