The gas tank of Chirstopher's car holds 17 gallons of gas. For 1 hour, 2 gallons of gas is used and for 2 hours, 4 gallons of gas is used. How much gallons of gas will be there after 4 hours?
A
9 gallons
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B
8 gallons
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C
7 gallons
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D
6 gallons
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Solution
The correct option is A 9 gallons The required sequence is:
2, 4, 6, 8
After 4 hours, 8 gallons of gas would have been used.