James types 84 words in 2 minutes. He estimates that his history essay is 420 words long. What is the least amount of time James will need to type his essay?

2 Answers
Mar 28, 2018

Answer:

#"10 min"#

Explanation:

#"84 words = 2 minutes"#

So

#"42 words = 1 minute"#

Then

#"420 words" xx ("1 min")/("42 words") ="10 minutes"#

Mar 28, 2018

Answer:

#10# minutes.

Explanation:

If James can write #84# words in #2# minutes, then he writes #84/2# words/minute, or #42#. Since #420# is #42xx10#, he can write #420# words in #10# minutes.