Question

An  oil drum has how many surfaces ??​

Answer 1

Answer:

We have

Diameter=2m

So, radius =1m

and, Height =7m

Now,

Total surface area of one drum is =2πr(r+h)

=2× 722 ×1(7+1) 2× 7

22×8= 7352 m 2

Now,

Total cost to be paid to the painter of 10 drums= 7352 ×10×3

=Rs15057