Question

A closed cylindrical tank of height 1.4 m and radius of the base is 56 cm is made up of a thick metal sheet. How much metal sheet is required (Express in square meters)

Answer 1

Given the height of cylindrical tank $=$$h$$=$1.4 m

And Radius of cylindrical tank $=56$ cm $=0.56$ m

So the Metal sheet required to make cylindrical tank are $=$ total surface area of cylindrical tank$=$ $2\pi r(r+h)$

$=$ $2\times \frac{22}{7}\times 0.56(1.4+0.56)$

$=$ $2\times 22\times 0.08\times 1.96=6.8992m^2$

Then metal sheet required $=$ $6.9m^2$