If Celestia can type 50 words every five seconds, how many seconds does it take to type 18 words?
If Celestia can type 50 words every five seconds,
how many seconds does it take to type 18 words?
( 50 wd ) / (5 sec) = 10 wd/sec
(18 wd) / (10 wd/sec) = 1.8 sec
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