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PUMP I

water pumped in 20 min = 5000 L

water pumped in 1 min = 5000 / 20 L = 250 L

PUMP II

water pumped in 25 min = 5000 L

water pumped in 1 min = 5000 / 25 L = 200 L

let x be the time for which pump I works and let y be the amount of time for which pump II works.

then

250x + 200y = 5000

5x + 4y = 100

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17y ago
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Q: Two pump are being used one pump 5000 L in 20 min and other 5000 L in 25 min how long will it take the two pumps together to pump 5000 L?
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