Q. 74.5( 12 Votes )

Answer :

Diameter of each circular plate = 14 cm

∴ their radius, r = 7 cm

Thickness of each plate = 0.5 cm

50 plates are placed one above the other to form a right circular cylinder

∴ height of the cylinder formed, h = 50 × 0.5 cm

Or h = 25cm

Total surface area of the cylinder = 2πr(r + h)

= 1408 cm^{2}

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