what tonnage is needed for 330m long 3m wide 3inches deep
The term "tonnage" doesn't make sense here.....I assume you want to know the "volume"
We just need to convert the inches to meters
We have
3in x 1m/39.37in = (3/39.37)m
So the total volume is given by
330m x 3m x (3/39.37)m = 68.58m^3