It is Required to Make a Closed Cylindrical Tank of Height 1 M and Base Diameter 140 Cm from a Metal Sheet. How Many Square Meters of the Sheet Are Required for the Same? - Mathematics

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It is required to make a closed cylindrical tank of height 1 m and base diameter 140 cm from a metal sheet. How many square meters of the sheet are required for the same?

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Height of the cylindrical tank (h)=1m.
Base radius of cylindrical tank (r) = `140/2`m =70 cm 

Area of sheet required – total surface area of tank = 2π (r+h)
=2×3.14×0.7 (0.7 +1) `m^2`

= 4.4×1.7`m^2`
∴So, it will required  `7.48m^2` of metal sheet.

Concept: Surface Area of Cylinder
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RD Sharma Mathematics for Class 9
Chapter 19 Surface Areas and Volume of a Circular Cylinder
Exercise 19.1 | Q 4 | Page 8

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