Question

find the cost of painting a cylindrical tank with a radius 91 cm and height 2 M at rupees 8 per square metre​

Answer 1

Hi friend!

We know, TSA of cylinder = 2πr(r+h).

In a tank, the above part is opened as we pour water, so -

=2x22/7x91x200(91+200)

=33,290,400 CMS.

so, 33,290,400 cms in metres will be - 33,290,4 meters.

So total cost = 8x332904 = 266,323,200₹

Hope it is correct !