Answer:
6.7
Step-by-step explanation:
you do the diameter (1.2) and multiply it by 3.14 (or pi) and get 3.76 (round up to 3.8) then you multiply 3.8 and the length (3.5) and get 13.3 then you half it (divide by 2) because its not a full cylinder and you get 6.65 (round up to 6.7)
