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03 Dec 2025, 23:32
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
83% (02:03) correct
17%
(02:17)
wrong
based on 150
sessions
History
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The flow of water through a drainage pipe was monitored for a 3-hour period. In the second hour, the rate of flow was 15 gallons per hour, which was 50 percent faster than the rate of flow for the first hour. If 25 percent more water flowed through the pipe in the third hour than it did in the second, how many gallons of water flowed through the pipe during the entire three hours?
A. 41.25
B. 42.5
C. 43.75
D. 45.0
E. 57.5
A. 41.25
B. 42.5
C. 43.75
D. 45.0
E. 57.5
03 Dec 2025, 23:56
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Bunuel
Let the flow rate for the three hours be a,b,c respectively.
Second hour flow rate (b) = 15 gallons per hour.
Second hour flow rate (b) = 50% faster than First hour flow rate (a)
b = (3/2) a
15 = (3/2)*a
a = 10 gallons per hour
C = 25% more than the water flowing through second gallon.
C = (5/4)* 15
C = 75/4 = 18.75
C = 18.75 gallons per hour.
Total gallons per hour = a+b+c = 10+15+18.75 = 43.75
Option C
Can be done using ratios.
a:b = 2:3
b:c = 4:5
Then, a: b: c = 8:12:15 = 8x : 12x : 15x
Totally 35x
Given that 12x = 15 , then x = (5/4)=1.25
Total = 35x = 35 * 1.25 = 43.75
Option C
04 Dec 2025, 09:23
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Given during second hour 15 gallon per hour flowed & it was 50% higher than first hour
Hence in first hour the rate is 10 gallon per hour
And in third hour the total water flow during hour was 25% higher than 2nd hour = 18.75 gallon
Therefore, total gallon was 10 + 15 + 18.75 = 43.75 (Option C)
Hence in first hour the rate is 10 gallon per hour
And in third hour the total water flow during hour was 25% higher than 2nd hour = 18.75 gallon
Therefore, total gallon was 10 + 15 + 18.75 = 43.75 (Option C)
