Two pipes can separately fill a tank in 3 h and 4 h respectively. If they are both used together, how much time will they take to fill the tank?
Answers
Answered by
27
Answer:
Step-by-step explanation:
let us assume that work to be done is of 12 units. ( LCM of 3 and 4)
Pipe A is doing = 4 unit/h
Pipe B is doing . = 3 unit/h
Together they are doing 7 unit/h of work.
total time to be taken . = 12/ 7 = 1.7 hours
Answered by
17
Answer:
12/7 hours
Step-by-step explanation:
Two pipe's work together =1/3+1/4
=(4+3)/12
=7/12
so the answer is 12/7 hour
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