Two pipes P and Q would fill a cistern in 20 mins and 30 mins respectively.
both pipes being opened how much time it will take to fill the cistern ?
options:
Shortcut : (aXb)/(a+b)
Solution :(20x30)/(20+30)
=600/50
=12 min.
both pipes being opened how much time it will take to fill the cistern ?
options:
Shortcut : (aXb)/(a+b)
Solution :(20x30)/(20+30)
=600/50
=12 min.
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