Answer:
Joseph take 18 minute to type 10,000 words
Step-by-step explanation:
Given Data
J (Joseph) and K (Kelly) together type=75,000 words at 90 minutes
Means J+K=75,000 at 90 minutes
Joseph types twice of Kelly
Means J=2xK
To find
Joseph type =10000 words at time=?? minutes
Solution
J+K=75,000
As we Known J=2xK
So
2K+K=75,000
K=75,000/3
K=25,000 Means Kelly typed 25,000 words out of 75,000
J=75,000-25,000
J=50,000 Means Joseph typed 50,000 words out of 75,000
So Joseph Typed 50,000 words at 90 minutes and each word time taken as
J=50,000/90
Joseph typed=555.5 words per minute
Now For Joseph type 10,000 words at time
J=10,000/555.5
Joseph Time taken=18 minutes to type 10000 words
Answer:
0.3 hour or 18 minutes
Step-by-step explanation:
Kelly types half as fast as Joseph, so in the time it takes Joseph to type 10,000 words, Kelly can type 5000. That means they can type 15,000 words working together for that time. We are given their "working together" typing speed, so we can write the proportion ...
(time for 15000 words)/(15000 words) = 1.5 hours/(75000 words)
Multiplying by 15000 gives ...
(time for 15000 words) = (1.5 hours)×(15000/75000) = 1.5/5 hours
time for 15000 words = 0.3 hours = 18 minutes
Joseph can type a 10,000 word article in 0.3 hours, or 18 minutes.
