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Joined: 16 May 2014
Posts: 592
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GRE 1: Q165 V161
Working alone at its constant rate, machine A produces k lit
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29 May 2014, 04:37
29 May 2014, 04:37
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Working alone at its constant rate, machine A produces k liters of a chemical in 10 minutes. Working alone at its constant rate, machine B produces k liters of the chemical in 15 minutes. How many minutes does it take machines A and B, working simultaneously at their respective constant rates, to produce k liters of the chemical?
___________ minutes
___________ minutes
Re: Working alone at its constant rate, machine A produces k lit
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08 Aug 2018, 06:46
08 Aug 2018, 06:46
6 min
Re: Working alone at its constant rate, machine A produces k lit
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10 Aug 2018, 15:49
10 Aug 2018, 15:49
1
For Machine A, in 1 minute it produces K/10 litres.
For Machine B, in 1 minute it produces K/15 litres.
Together in 1 minute they produce k/10 + k/15 litres = k/6 litres
So, K/6 litres are produced in 1 minute.
K litres are produced in 6 minutes.
Ans - 6 minutes.
For Machine B, in 1 minute it produces K/15 litres.
Together in 1 minute they produce k/10 + k/15 litres = k/6 litres
So, K/6 litres are produced in 1 minute.
K litres are produced in 6 minutes.
Ans - 6 minutes.
