Hi,
Can anyone help with this problem?
Thanks.
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magical cook
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You can do this with variables, but it's easiest to plug-in real numbers.
Assume that the total number of units produced was 60.
Machine K produced 1/4 of the total (15 units) in 3 hours, which equals 5 units per hour.
Together, the two machines produced 3/4 (45 units) in 6 hours.
In 6 hours, Machine K produced 5*6 = 30 units.
Thus, Machine M produced 15 units in 6 hours, or 2.5 units per hour.
To produce 60 units, it would take Machine M 60/2.5 = 24 hours.
Answer D.
Assume that the total number of units produced was 60.
Machine K produced 1/4 of the total (15 units) in 3 hours, which equals 5 units per hour.
Together, the two machines produced 3/4 (45 units) in 6 hours.
In 6 hours, Machine K produced 5*6 = 30 units.
Thus, Machine M produced 15 units in 6 hours, or 2.5 units per hour.
To produce 60 units, it would take Machine M 60/2.5 = 24 hours.
Answer D.
