Answer:
The answer would be 23,775.4
Step-by-step explanation:
The answer would be 28.26.
The reason this would be the answer is because radius is half of a circle and diameter goes through the entire circle the formula for this problem would be
Circumference= 

and the tent has radius of 3m which means we have to multiple 3 × 3 to get 9m and then we would multiply 9 × 3.14 = 28.26
Volume of cone=1/3 times height times pir^2
v=15
r=3
15=1/3 hpi3^2
15=1/3hpi9
15=9/3hpi
15=3hpi
divide 3
5=hpi
h=5/pi
pi=aprox 3.14
5/3.14=1.59
1.59 ft