Respuesta :

Answer: We have 30 pump-hours needed to pump 40000 L

so x/30 = 60000/40000 , where x is the number of pump-hours

x = 45

pump-hours = 45

if pumps = 9

hours = 5

Step-by-step explanation:

Answer:

Step-by-step explanation:

hrs   pumps    litres

3       10        40000

?         9        60000

3×10/9×40000/60000

=20/9 hrs  = 2hrs 13 minutes

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