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50 Circular Plates Each of Diameter 14cm and Thickness 0.5cm Are Placed One Above Other to Form a Right Circular Cylinder. Find Its Total Surface Area? - Mathematics

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

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Solution

Given that 50 circular plates each with diameter = 14cm

Radius of circular plates (r) = 7cm

Thickness of plates= 0.5

Since these plates are placed one above other so total thickness of plates = 0. 5 x 50

= 25cm.

Total surface area of acylinder = 2πrh + 2πr2

= 2πrh + 2πr2

= 2πr (h+r)

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

T.S.A = 1408cm2

∴Total surface area of circular plates is  1408cm2

 

 

 

 

 

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APPEARS IN

RD Sharma Class 10 Maths
Chapter 14 Surface Areas and Volumes
Exercise 14.1 | Q 7 | Page 28
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