Question 1076779
The tasks in the question are alike. How long does it take to paint 5 10x14 rooms. Latoya can do it in 14 hours, or 1/14th of the task in an hour. Similarly, Lisa can finish 1/10th of the task per hour. Let n be the time it takes them working together. Then:
1/14 + 1/10=1/n
5n+7n=70
12n=70
n=70/12=35/6
Working together, it takes them 35/6 hours, or 5 hours and 50 minutes. &#9786;&#9786;&#9786;&#9786;