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working together at their constant rates , A and B can fill [#permalink]
09 Jun 2010, 06:00
100% (03:25) correct
0% (00:00) wrong based on 3 sessions
15.working together at their constant rates , A and B can fill an empty tank to capacity in1/2 hr.what is the constant rate of pump B? 1) A's constant rate is 25LTS / min 2) the tanks capacity is 1200 lts.
I think the answer is C ( 1and 2 are needed to solve) But i have seen A as the answer. Could sombody pls explain in detail thx!
Re: Help pls DS rate problem [#permalink]
09 Jun 2010, 08:26
A in insufficient. Depending on the size of the tank, you will get different values for the rate of pump B. For instance, if the tank is 50 lts, the rate of B is 75 lts/min. If the tank is 100 lts, the rate of B is 175 lts/min.