A closed cylindrical tank of diameter 21 m and height 4 m is made of steel. How much area of steel sheet is required?
Given,
diameter of cylindrical tank =21 m.
height of cylindrical tank =4 m.
Then, radius r=212=10.5
Total Surface Area of Cylinder
=2πr(h+r)
=2×3.14×10.5(4+10.5)
=2×3.14×10.5×14.5
=956.13 m2
Total steel sheet required to make tank is =956.13 m2