Cylinder volume: 0.96? x3. 14x2=5.79dm？ (Keep two decimal places)

If π≈3

Bottom diameter: 6÷3÷2= 1dm.

Cylinder volume: 3x 1? x2=6dm？

2. Because cutting into four sections will add four sides.

Steel bottom area = 18.84÷4=4.7 1cm?

5dm=50cm

Steel volume =4.7 1x50=235.5cm?

3. 2.5m = 25m

Surface area =3x3. 14x25+(3÷2)? x3. 14x2

=249.63dm？

=2.4963m？