5-7. Tank A contains 90% O2 that is mixed with another tank B containing 30% of O2 to get a Tank C containing 65% O2 .5. What is the ratio of the gas used from Tank A to that used from Tank B?

5-7. Tank A contains 90% O2 that is mixed with another tank B containi

1.	5-7. Tank A contains 90% O2 that is mixed with another tank B containing 30% of O2 to get a Tank C containing 65% O2 .5. What is the ratio of the gas used from Tank A to that used from Tank B?
A.	1.0
B.	1.2
C.	1.4
D.	1.6
Answer» D. 1.6