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10 Apr 2017, 02:21
Kudos
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
33% (02:39) correct
67%
(02:49)
wrong
based on 21
sessions
History
Date
Time
Result
Not Attempted Yet
Each day after today, the price of gas, in cents per gallon, increases 5 cents per day. The day after the price reaches twice its current level, the price falls by 25% but then continues the pattern of increasing 5 cents per day. How much does a gallon of gas cost, in cents, at the end of 25 days, if the price today is 95 cents a gallon?
A. 165
B. 167.5
C. 170
D. 172.5
E. 175
A. 165
B. 167.5
C. 170
D. 172.5
E. 175
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altairahmad
10 Apr 2017, 05:01
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By manual calculation its D.
10 Apr 2017, 08:45
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double as in the cost becomes 190 cents,..in 19 days,,,
but falls by 25% = 142.5 cents
remaining 6 days it rises by 6 * 5 = 30
142.5 + 30 = 172.5
ans D
but falls by 25% = 142.5 cents
remaining 6 days it rises by 6 * 5 = 30
142.5 + 30 = 172.5
ans D
to discover that this brute force instance took 2:26.
