Question

What is the exact volume of a cylinder that has a height of 1.8 ft and a radius of 6.1 ft?

ft3

Answer 1

The volume of any cylinder is

Volume = (pi) x (radius of a round end)² x (height)

= (pi) x (6.1-ft)² x (1.8-ft)

= (pi) x (37.21 square feet) x (1.8-ft)

= 66.978 π cubic feet

Since π (pi) can't be written exactly, no number it appears in
can be written exactly either. The only way to indicate the
exact value of such a number is to leave the symbol 'π' in it.