"Do not confuse motion and progress. A rocking horse keeps moving but does not make any progress."
- Alfred A. Montapert, Philosopher.
- Alfred A. Montapert, Philosopher.
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Ian Stewart
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The first machine processes 100 units in 5 hours, so processes 20 units per hour, or 40 units in 2 hours. Since we want to process a total of 100 units in 2 hours, the other machine will need to process 60 units in 2 hours, or 30 units per hour.
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Assume the rate for new machine is x units/ hr
as revised combined rate for two machines (old and new) is 50 machines/hr
and rate for the old machine is 20 units/hr
20 + x= 50
x= 30 units/hr
as revised combined rate for two machines (old and new) is 50 machines/hr
and rate for the old machine is 20 units/hr
20 + x= 50
x= 30 units/hr
That was easy!!!Ian Stewart wrote:The first machine processes 100 units in 5 hours, so processes 20 units per hour, or 40 units in 2 hours. Since we want to process a total of 100 units in 2 hours, the other machine will need to process 60 units in 2 hours, or 30 units per hour.
Thx!
"Do not confuse motion and progress. A rocking horse keeps moving but does not make any progress."
- Alfred A. Montapert, Philosopher.
- Alfred A. Montapert, Philosopher.
