a / b = c / d = 3
∴ a :b = 3:1 ,c:d = 3:1
∴ a = 3 b ,c = 3 d
∴ (a + c) /(b + d)
= (3 b + 3 d)/(b + d)
= 3(b + d)/ (b + d)
= 3
a / b = c / d = 3
∴ a :b = 3:1 ,c:d = 3:1
∴ a = 3 b ,c = 3 d
∴ (a + c) /(b + d)
= (3 b + 3 d)/(b + d)
= 3(b + d)/ (b + d)
= 3