Your answer is A. grams
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If the radius of the cylinder is halved and length is kept unchanged then the density of air inside the cylinder will increase.
As it can be said that density is inversely proportion to the square of the radius.
Density of Cylinder
Density is the ratio of mass to volume.
The formula for density is: ρ= m/v.
The formula for the Mean Density of a cylinder is:
ρ= m/ (π•r²•h)
where:
ρ is the density of the cylinder
m is the mass of the cylinder
h is the height of the cylinder
So, with increase in radius the of the cylinder there is decrease in the density of cylinder.
And on decreasing the radius of the cylinder there is increase in the density of the cylinder.
As it can be said that density is inversely proportion to the square of the radius.
To learn more about Density Of Cylinder
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First find the missing angles. right now you have 30, 60, and 45. that dotted line between 45 and 60 is connected to another line dividing the 360 in half (making it only 180) if its in two parts and part 1 is 60 that makes part 120. you need angle PF though, so add your 120 on to the 30 giving you 150. to check your answer you add up all sides and if it makes 360 then it's right. my answer for angle PF would be 150.