A week has gone by without any other member showing interest in this problem. They might even consider this problem puerile or even elementary. I for one would say even genius like Newton reported to have made two separate holes at the bottom of door one large enough for dog to get in and a small one to let for its puppy in . Coming to your answer here, i must congratulate and you are absolutely correct. If it is convenient post as to how you approached and the steps that lead to correct solution. Regards. God Bless.
Thank you sir... First I guessed without using paper and pen... Then I try to solve using simple equations.. like a+b =10 b+c = 20 c+a = 24 and its total sum came 2a+2b+2c = 54 so a+b+c = 54/2 = 27
