Im pretty sure its 18 unless im reading it wrong
Y=17 If it's just 1037/61
REVISED ANSWER.
In the picture, I have drawn on the example given. the RC and PD are the same because They are across from each other perfectly. So the answer is still PD=400m but if there can be two answers then I would have to say another possiblity would be 200m for the diameter of the pond. The wording of this problem is tricky and the picture can throw you off a bit but I did my best to answer properly here.
So if you could mark brainliest that would be awesome.
44 + 55=11 x 4 + 11 x 5
99 = 44 + 55
99 = 99
Infinity solution
7,440 I believe, all you need to use is basic subtraction for this.