an oil tanker can be emptied by the main pump in 5 hours. an auxiliary pump can empty the tanker in 8 hours. if the main pump st
arted at 5 pm, when should the auxiliary pump be started so that the tanker is emptied by 9 pm?
2 answers:
1pm is the correct answer
8+1=9
Answer:
1 pm
Step-by-step explanation:
1 + 8 = 9
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2n = -2 - 10
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