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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? - CBSE Class 9 - Mathematics

ConceptSurface Area of a Right Circular Cylinder

#### Question

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?

#### Solution

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

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

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

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#### APPEARS IN

RD Sharma Solution for Mathematics for Class 9 by R D Sharma (2018-19 Session) (2018 to Current)
Chapter 19: Surface Areas and Volume of a Circular Cylinder
Ex.19.10 | Q: 4 | Page no. 8
Solution 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? Concept: Surface Area of a Right Circular Cylinder.
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