11. If 6 gallons of gasoline are added to a tank that is already filled to 3/4 of its capacity, the tank is then filled to 9/10 of its capacity. How many gallons does the tank hold?
(A) 20
(B) 24
(C) 36
(D) 40
(E) 60
Answer:
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Solution:
ReplyDeleteWhen 6 gallons of gasoline was added, then gasoline in tank increased to 90% of its capacity from 75%.
Capacity of tank = 6 / 15 * 100 = 40 gallons.
Currently tank is filled up to 90%.
Hence currently tank hold 0.9 * 40 = 36 gallons
Maximu tank can hold =40gallons
gallons of gasoline.