Three pumps can fill a water tank separately in 15,20 and 30 hour respectively, the three pumps are start together at 8 am.when the tank is already one- fifth full.the first pump is stopped after 4 hour.the third pump is stopped after 2 more hour.at what time will the tank be full.
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Answer:
2pm
Step-by-step explanation:
8:00 am+4 hours
The 2 pumbs ended after 4:hours
12:pm
after 2 hours
2 pm
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