# Find the total surface area of a closed cylindrical petrol storage tank whose diameter is 4.2 mts and heght is 4.5 mts.

2
by jeruwil156

Log in to add a comment

by jeruwil156

Log in to add a comment

Use the formula 2πr(r+h)

It is

2πrh+ 2πr²

2(3.14)(2.1)(4.5) + 2(3.14)(2.1)²

=59.346 + 27.694

= 87.04 m²

2πrh+ 2πr²

2(3.14)(2.1)(4.5) + 2(3.14)(2.1)²

=59.346 + 27.694

= 87.04 m²