#2 might be 13.9m^2, although there's a possibility I did that wrong. I assumed the 15m goat reaching distance was split evenly between the angles so I used trig to find the height of that small triangle. There's 2 heights of the small triangle and we need to find diameter first so I did 2x + Diameter = height of whole triangle, where x= the height of the small triangle. Not certain with this but the process I did makes sense to me.
Let the shares of the 5 recipients be denoted as a, b, c, d, and e, respectively, where a gets the most bread and e gets the least. You know from the question that:
a + b + c + d + e = 100
and that 1/7(a + b + c) = d + e
However you don't care about this, you need the value of the difference between them. This question says that the difference between these values is a constant (I'm assuming that's what arithmetic means). That being said you can express both these equations in terms of two variables: e and the difference between the bread amounts, x.
e = e
d = e + x
c = e + 2x
b = e + 3x
a = e + 4x (because a is the most bread)
This is correct. It doesn't seem right but I did it out and googled it. If your teacher is going to give you "famous" math problems he/she should think again before referencing them right in the problem. Super easy to verify.