Question

sopve plese ............. .....

Answer 1

I think option c is the answer

Answer 2

10:20 :: 19:40

10 / 20 = 19 / 40

So to make it in proportion we need to add 1 in 19

10 : 20 :: 20:40

1:2 :: 1:2

Hence they are in proportion.

So option C answer.


Thanks