Question

it takes 3 hours for 10 pumps to pump 40000 liters of water into a farm dam .
How long will it take 9 similar pumps to pump 60000 liters of water into the dam?

Answer 1

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

Answer 2

10 Pumps: Rate = 40,000L/3h = 13,333.3 L/h.

9 Pumps: Rate = 9/10 * 13,333.3 = 12,000 L/h.

T = 60,000/12000 = 5 Hours.

Answer 3

I don't understand

Answer 4

I don't get it

Answer 5

Well specificly I don't understand the answer.