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Three hoses, x, y, and z, pump water simultaneously at a rate of 600 gallons per hour. If each hose is independent of the other two hoses, at what rate does each hose pump water?
1) x pumps water at a rate of 150 gallons per hour.
2) y pumps water at half the rate of x.
The OA is C.
An approach can be,
1/x + 1/y+ 1/z = 1/600
1. x's rate is given. doesn't help with other two. INSUFFICIENT
2. y = 1/2*x gives nothing about x and z. INSUFFICIENT
Combining 1 and 2, we get x and y, so z can be deduced. Hence C.
1) x pumps water at a rate of 150 gallons per hour.
2) y pumps water at half the rate of x.
The OA is C.
An approach can be,
1/x + 1/y+ 1/z = 1/600
1. x's rate is given. doesn't help with other two. INSUFFICIENT
2. y = 1/2*x gives nothing about x and z. INSUFFICIENT
Combining 1 and 2, we get x and y, so z can be deduced. Hence C.
