A cistern can be filled separately by two pipes in 12 and 16
minutes separately. If both fill pipes are opened together,
when will the cistern be filled?
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a man rows upstream in still water at 3 km/h and back to the same place at 5 km/h he takes 48 minutes altogether. how far upstream did he go?Dan invests £22000 into a Saving accounts.The bank gives a 5% compound interest for the first 3 Years and 4% .Thereafter. How much will Dan have after 7 Years to the nearest pound
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A cistern can be filled by two pipes filling separately in 12 and 16 minutes separately. Both the pipes are opened together for a certain time but being clogged, only
of the full quantity of water flows through the former and only
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