Pipe A can fill reservoir in 5 hours, the same reservoir can be filled by pipe B in 4 hours. There is pipe C at the bottom of reservoir which can empty it in 8 hours. If all the three pipes are opened simultaneously, then in how much time the tank will fill?

4th option is correct xy=-10

if this was to u plzz mark me the brainliest

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies