Tanker

An oil tanker can be emptied by the first pump in 4.9 hours. Second pump can empty an tanker in 8 hours. If the first pump started at 4:00 and second 1.4 hour later, at what time will the tanker be empty?

Correct answer:

t =  3.6 h

Step-by-step explanation:

14.9t+18(t1.4)=1  t=4.98+1.44.94.9+8=3.6 h=3:34



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