Question

If 1/b+ 1/d= 2/c
and a+c=2b, which one of the following is correct?
(a)a: d=b:c
(b) ac = bd
(c) a2 : c2=b:d
(d) a : b=c:d​

Answer 1

Answer:

Option (c) : 2a:2c=b:d