Answer:
11
Step-by-step explanation:
11 + 10 = 21
Area of base is Circumference x
or A = 25 x 
A = 78.53981
Volume = Area of Base x Height or V = 78.53981 x 8
V = 628.32 Units
The volume of the cylinder is 628.32 units
(5x) / (2/11) = 3 / (1/5)
cross multiply
(5x)(1/5) = (2/11)(3)
x = 6/11
By Sine Rule,
x/sin30° = 8/sin90°
x/0.5 = 8/1
So x = 4.
The common factors for 20 is 1,5
25 is 1,5
40 is 1,5
GCF:5