36
d = 25
The answer might depend on what c and d are supposed to be!
the answer is a
C = D C = 10 utils, and D = 10 utils
They all equal each other. a = b = c = d = e e = a e = b e = c e = d e = e
As A/B=C/D , So B=(A*D)/C
c = 6 and d = 7
25 of December is Christmas day
If: a = b+c+d Then: c = a-b-d
c
6d = c Divide both sides by 6: d = c/d