Question 760882
Hi Lauryn,
If you just consider your polytunnel as a whole cylinder, work out the volume for the whole cylinder and then halve it.
Length of polytunnel = 8m (4 x 2m)
Volume = Pi r^2 h (Using length instead of height)
       = Pi* 2^2 * 8m
       = 100.53m^3
Halve it
       = 50.3m^3 (1 decimal place).
Hope this helps.
:-)