mehrasa wrote:assembly line alpha starts and creates widgets at a rate of 25 w per hour. exactly one hour later, assembly line beta begins production at a rate of 30 w per hour. in how many minutes will the two assembly line have produced the same number of widgets?
1) 5
2) 25
3) 250
4) 300
5) 350
An alternate approach is to PLUG IN THE ANSWERS. which represent the total time for Beta.
Since Alpha begins to work one hour earlier than Beta, Alpha's total time is 1 hour longer than Beta's total time.
When the correct answer choice is plugged in, Beta and Alpha will produce the same number of widgets.
Answer choices A and B seem way too small.
Of the remaining answer choices, start with the option in the middle (D).
Answer choice D: 300 minutes = 5 hours
At a rate of 30 widgets per hour, the number of widgets produced by Beta in 5 hours = r*t = 30*5 = 150.
At a rate of 25 widgets per hour, the number of widgets produced by Alpha in 6 hours = r*t = 25*6 = 150.
Success!
The correct answer is
D.
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