1.

To fill a tank, tubes P, Q and R take 10 minutes, 7.5 minutes and 6 minutes respectively. The time in minutes that the tubes together will take to fill the tank is:

Answer»

To fill a tank, tubes P, Q and R take 10 minutes, 7.5 minutes and 6 minutes respectively. The time in minutes that the tubes together will take to fill the tank is:




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