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Working simultaneously and independently at an identical con

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mitzwillrockgmat Master | Next Rank: 500 Posts Default Avatar
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Working simultaneously and independently at an identical con

Post Mon May 24, 2010 4:43 am
Working simultaneously and independently at an identical constant rate, 4 machines of a
certain type can produce a total of x units of product P in 6 days. How many of these
machines, working simultaneously and independently at this constant rate, can produce a
total of 3x units of product P in 4 days?

A. 24
B. 18
C. 16
D. 12
E. 8

Can someone break this down for me logically, in words. thanks Smile

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liferocks Legendary Member Default Avatar
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Post Mon May 24, 2010 4:49 am
4 machines make x units in 6 days

so x units are prepared in 6*4 machine days
so 3x units are prepared in 3*6*4 machine days

if number of days is 4, number of machines will be 3*6*4/4=18

Ans option B

_________________
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