Together, the 2 machines made 960 copies
Step-by-step explanation:
There are two copy machines
- The first copy machine makes 60 copies per minute
- The second copy machine makes 80 copies per minute
- The second machine starts making copies 2 minutes after the first machine starts
- Both machines stop making copies 8 minutes after the first machine started
We need to find that together they made how many copies
∵ The rate of first machine is 60 copies per minute
∵ Both machines stop making copies 8 minutes after the first
machine started
∵ The first machine worked for 8 minutes
∴ The first machine made = 60 × 8 = 480 copies
∵ The second machine started 2 minutes after the first machine starts
∵ Both machines stop making copies 8 minutes after the first
machine started
∴ The second machine worked for = 8 - 2 = 6 minutes
∵ The rate of second machine is 80 copies per minute
∴ The second machine made = 80 × 6 = 480 copies
∴ The total copies of them = 480 + 480 = 960 copies
Together, the 2 machines made 960 copies
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