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2013-01-14 pm 5:23:00
12.--.101.18 |
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2013-01-14 pm 5:32:00
199.--.137.1 |
| 22222222222222222
저도 11.25나오네요.
식은 파이프에서 나오는 물의 양을 X
시간은 H
그래서
(X + 1.25X)H = 1
둘다 틀었을땐 H=5 대입.. 그럼 X=1/11.25
이런식으로 풀면 될듯해요. |
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2013-01-14 pm 5:27:00
24.--.47.134 |
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2013-01-14 pm 5:30:00
71.--.13.125 |
| 5x+ (1.25 *5)x = y. -> 11.25x=y -> 답은 11.25
저도 1번님과 같은 답! |
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2013-01-14 pm 5:31:00
76.--.221.191 |
| 12.5 시간 걸리네요.
x=amount of water from small pipe
y=amount of water in pool
y /(1.25+1)x = 5
y=12.5x
12.5x/x=12.5 hrs
설명이 되나 모르겠네요. |
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2013-01-14 pm 5:32:00
108.--.213.62 |
| | (x+1.25x)5=1, x= 1/11.25, therefore 11.25 hours |
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2013-01-14 pm 5:32:00
12.--.101.18 |
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2013-01-14 pm 5:35:00
108.--.53.84 |
| X: the amount of water to fill the pool
R1: rate of water per hour through the slower pipe
R2: rate of water per hour through the faster pipe
t12: time to fill the pool with both the pipes
t1: time to fill the pool with only the slower pipe
t2: time to fill the pool with only the faster pipe
R2 = 1.25 x R1
t12 = 5 = X / (R1+R2) = X / (R1+1.25xR1) = X / (2.25xR1) = (1/2.25) x (X/R1)
t1 = X / R1 = 5 x 2.25 = 11.25
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2013-01-14 pm 5:42:00
98.--.189.158 |
| -Wongul's daughter-
THANK YOU SO MUCH FOR HELPING ME!!! :D |
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