Question

If a : b = c : d then

1) ab = cd
2) ad = bc
3) a + b = c + d
4) All of these

Answer 1

Answer:

the correct answer is option 2) ad = bc

please mark me as a braniliest..

Answer 2

Step-by-step explanation:

1:2=2:4

but

1*2 not equal 2*4

1+2 not equal 2+4

4*1=2*2

hence 2 is correct