Question

50 circular plates each of diameter 14 cm and thickness 0.5 cm are placed one above the other two form a right circular cylindrical. Find its total surface area

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Answer 1

Answer:

1408cm²

Step-by-step explanation:

thickness of one plate = 0.5cm

height of cylinder made by joining 50 plates =

50×0.5 = 25cm

radius of cylinder made = 14/2 = 7cm so, total surface area of cylinder = 2πr(r+h)

= 2×22/7×7(7+25)

= 44×32

= 1408cm² ....ans.