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

"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

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.