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blondinia [14]
2 years ago
8

Points!!!

Mathematics
1 answer:
sattari [20]2 years ago
7 0
(1/40) - (1/x) = (1/60) 
x = 1/(1/40) - (1/60)) =
<span>A.) 120</span> minutes 
Its similar to the other question.
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Murrr4er [49]
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igor_vitrenko [27]

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MA_775_DIABLO [31]

let's solve :

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8 0
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