Your answer would be B.
HOPE THIS HELPS YOU! ^_^
Answer:

Step-by-step explanation:
Curved surface area=
where R is radius and H is height
Since H=6R then curved surface area=
Therefore,
and making R the subject

Therefore, H=6R=6*3.000604=18.00362 m

Therefore, 
Answer:
2/5
Step-by-step explanation:
Answer:
12
Step-by-step explanation: