Question

two pipes p q can separately fill the tank in 20 hours and 30 hours respectively if both the pipes are opened simultaneously how much time will be taken to fill the tank​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

We can solve this question by short method..

As per given question, A=24(Time to fill up tank)

Similarly, B=30

Take the LCM of both A & B i.e 120

This number shows that 120 is full work which will have to complete by the A &B .

So firstly find out that how much time would take by single one( A or B).

So divide the 120/24 =5 and 120/30=4 respectively.

So individually the time taken by A & B would be 5 & 4.

Then in that case when both work together , the time will take 120/(5+4) = 40/3 hours