A cold wave - a series of cold days in terms of weather; a physical wave that is given by someone with a "cold" demeanor.
A fair day- a day with nice, mild weather; making a modest amount of money in a days work.
hope those help.
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, 
It would be nice If I could read it better. The answer is C if is says angle 3 and angle 5.