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it would take 150 minutes to fill the swimming pool using hte water from 5 taps .how many minutes will it take to fill the pool if only 3 taps  are used

B.an assumption being made in my working is that all the taps are flowing at the same ........

 Mar 26, 2020
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150 (5/3)  =   750 / 3  =   250 min

 

To see this  

 

Note  that  every minute  1/150 of the pool is filled

 

Then  each of the 5 taps fills     1/5  of this =  1 /150  * 1/5 =   1/750  of the pool

 

Then  3 taps fill    3/750   of the pool in a minute

 

Invert this fraction  =  

 

750  / 3    =    250 min

 

 

 

cool cool cool

 Mar 26, 2020

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