60 two rupees coins are placed one above the other to form a right circular cylinder. If each coin has
radius 1.6 cm and thickness 0.3 cm, find its total surface area.
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Answer:
197.2 cm²
Step-by-step explanation:
For height of cylinder = 60 × 0.3
= 18 cm
Total surface area of cylinder= 2πrh + 2πr²
= 2πr ( h + r)
= 2×22/7 × 1.6× ( 18+ 1.6)
= 2× 22/7 × 1.6 × 19.6
= 197.2 cm²
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