SSC
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Numerical Ability
Ratio and Proportion
If A : B = 3 : 4, B : C = 5 : 7 and C : D = 8 : 9 then
A: D is equal to
Read Solution (Total 3)
-
- a b c d
3 4 4 4
* * * *
5 5 7 7
* * * *
8 8 8 9
----------------------
120 160 224 252
a:d=120:252=10:21 - 8 years agoHelpfull: Yes(1) No(0)
Solution
=3*5*8:4*7*9
=5*2:7*3
=10:21
- 10 years agoHelpfull: Yes(0) No(0)
- A:B=(3:4)*5
B:C=(5:7)*4
then, A:C=(15:28)*2
C:D=(8:9)*7
answer is A:D=10:21 - 7 years agoHelpfull: Yes(0) No(0)
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