In a chemical experiment five identical vessels are partially filled with H2SO4. The ratio of the quantities of H2SO4 in the five vessels is 3 : 4 : 5 : 6 : 7. The total quantity of H2SO4 in the vessels is equal to 60% of the total volume of the five vessels. How many vessels are filled with H2SO4 to at least 50% of their volume?

In a chemical experiment five identical vessels are partially filled w

1.	In a chemical experiment five identical vessels are partially filled with H2SO4. The ratio of the quantities of H2SO4 in the five vessels is 3 : 4 : 5 : 6 : 7. The total quantity of H2SO4 in the vessels is equal to 60% of the total volume of the five vessels. How many vessels are filled with H2SO4 to at least 50% of their volume?
A.	1
B.	2
C.	3
D.	4
E.	5
Answer» D. 4

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