Question

if a:b = 5:7 and c:d=2a:3b then ac:bd is what ​

Answer 1

If a : b = 5 : 7 and c : d = 2a : 3b, then ac : bd is:

[A]20 : 38

[B]50 : 151

[C]50 : 147

[D]10 : 21

50 : 147









Hence option [C] is the right answer.

Answer 2

Step-by-step explanation

a/b=5/7

c/d=2a/3b

A/Q

c/d=2a/3b

put

a=5

b=7

c/d=2×5/3×7

c/d=10/21

then

ac/bd= 5×10/7×21

=50/147