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?

`["Assume "pi=22/7]`

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#### Solution

Height (*h*) of cylindrical tank = 1 m

Base radius (*r*) of cylindrical tank = (140/2)cm = 70cm = 0.7m

`"Area of sheet required = Total surface area of tank "=2pir(r + h)`

`= [2xx22/7xx0.7(0.7+1)]m^2`

`= (4.4xx1.7)m^2`

`= 7.48m^2`

Therefore, it will require 7.48 m^{2 }area of sheet.

Concept: Surface Area of Cylinder

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