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Snowcat [4.5K]
3 years ago
11

A machine can insert letters in envelopes at the rate of 120 per minute. Another machine can stamp the envelopes at the rate of

3 per second. How many such stamping machines are needed to keep up with 18 inserting machines of this kind?
(A) 12
(B) 16
(C) 20
(D) 22
(E) 24
Mathematics
1 answer:
Norma-Jean [14]3 years ago
7 0
I think the answer is D

Hope it helps :-D
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