50 circular plates each of diameter 14 cm and thickness 0.5 cm are pla

1.	50 circular plates each of diameter 14 cm and thickness 0.5 cm are placed one above the other to form a right circular cylinder. Find its total surface area.
Answer» Given, 50 circular plates each with diameter 14 cm Radius of circular plates = 7cm Thickness of plates = 0.5 cm As these plates are one above the other, the total thickness of all the plates = 0.5 x 50 = 25 cm So, the total surface area of the right circular cylinder formed = 2πr × h + 2πr² = 2πr (h + r) = 2(22/7) x 7 x (25 + 7) = 2 x 22 x 33 = 1408 cm² Therefore, the total surface area of the cylinder is 1408 cm².

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

Answer»

Given,

50 circular plates each with diameter 14 cm

Radius of circular plates = 7cm

Thickness of plates = 0.5 cm

As these plates are one above the other, the total thickness of all the plates = 0.5 x 50 = 25 cm

So, the total surface area of the right circular cylinder formed = 2πr × h + 2πr²

= 2πr (h + r)

= 2(22/7) x 7 x (25 + 7)

= 2 x 22 x 33 = 1408 cm²

Therefore, the total surface area of the cylinder is 1408 cm².