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An office has two envelope stuffing machines. Working together they can stuff a batch of envelopes in 4 hours. Working separately, it will take the second machine 6 hour longer than the first machine. How long would it take for the second machine to stuff a batch of envelopes?
A. 11 C. 12
B. 20 D. 10
An office has two envelope stuffing machines. Working together they can stuff a batch of envelopes in 4 hours. Working separately, it will take the second machine 6 hour longer than the first machine. How long would it take for the second machine to stuff a batch of envelopes?
A. 11 C. 12
B. 20 D. 10
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Answer:
D.
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