Question
An oil tanker can be emptied by the main pump in5 hours.An auxiliary pump can empty the tanker in 7hours.If the main pump is started
An oil tanker can be emptied by the main pump in5 hours.An auxiliary pump can empty the tanker in 7hours.If the main pump is started at4 PM, when should the auxiliary pump be started so that the tanker is emptied by8 PM?
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Discrete and Combinatorial Mathematics An Applied Introduction
Authors: Ralph P. Grimaldi
5th edition
201726343, 978-0201726343
