An empty fuel tank of a truck was filled with A-type petrol. When the tank was one third emptied it was filled with B-type petrol. Again when the tank was one third emptied it was filled with C type petrol. What is the ratio of A:B:C type of petrol in the tank at present.
A. 2:3:4
B. 4:3:2
C. 4:2:3
D. 3:2:4
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3:5:7
1:1:1
1:2:6
9:21:70
let initial amount of A be 90 ltr
after one third empty it will be 60 ltr
so volume of B is 30 ltr
again one third empty then volume of A is 60*2/3=40
volume of B is 30*2/3=20
then C filled A:B:C=40:20:30=4:2:3
1:1:1
6:2:1
1:1:2
4:2:3