Jim , Painting alone for 8 hours , completes painting part of a trailer . Harry , Painting alone for 2 hours ,completes painting the rest of the trailer .If Harry would have painted the whole trailer on his own , how long would it have taken him to complete his task .
1) Jim paints twice as much of the trailer in 8 hours as harry does in 2 hours.
So Jim painted \frac{2}{3} of the total in 8 hours. (and Harry paints the other 1/3 in 2)
If we know that he paints \frac{2}{3} in 8 hours, we can conlcude that he will need 4 more hours to complete the task.
(he paints 1/3 in 4 hours from the rate above)
2)Jim paints 1/12 of the trailer in 1 Hour .
So he will need \frac{1}{12}*x=1 (rate*time=work) x=12 hours to paint it. Sufficient
D
1) Jim paints twice as much of the trailer in 8 hours as harry does in 2 hours.
So Jim painted \frac{2}{3} of the total in 8 hours. (and Harry paints the other 1/3 in 2)
If we know that he paints \frac{2}{3} in 8 hours, we can conlcude that he will need 4 more hours to complete the task.
(he paints 1/3 in 4 hours from the rate above)
2)Jim paints 1/12 of the trailer in 1 Hour .
So he will need \frac{1}{12}*x=1 (rate*time=work) x=12 hours to paint it. Sufficient
D