#### 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) = `140/2`m =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`

= 4.4×1.7`m^2`

=`7.48m^2`

∴So, it will required `7.48m^2` of metal sheet.

Is there an error in this question or solution?

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.