A solid cylinder with a height of 8 units and a radius of 3.5 units is to be covered with a paper sheet. If the cost of the paper sheet is ₹40 per 5 square units, the cost (in ₹) of covering the cylinder is: (take π = )
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Correct answer: D
Explanation
The correct answer is Option 4 i.e. 2024.
Total surface area(TSA) = 2πrh(r + h)
⇒ 2 × × 3.5 × (3.5 + 8)
⇒ 2 × × 3.5 × 11.5 = 253
Cost per square unit: = ₹8
Total cost = 253 × 8 = ₹2024