Question

30 circular plates each with a radius 14 cm and thickness 3 cm are placed one above another to form a cylindrical solid find the total surface area of the cylinder so formed​

Answer 1

GIVEN :

no. of plates = 30

r = 14cm

thickness = 3cm

total surface area = 2πr(h+r)

= 2 × 22/7 × 14 (30×3 + 14)

=2×22×2(104)

=9152 cm sq

Answer 2

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