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Tutors Answer Your Questions about Rate-of-work-word-problems (FREE)
Question 844829: After 5 house of painting, jess asked the assistance of jon and finished the work in 4 more hours. had jon joined in an hour after jess started working, the job would have been finished in 7 hours. How long would it have taken jess to paint the house alone.
Click here to see answer by richwmiller(17219)   |
Question 844987: it takes the cold water faucet 3 times as long to fill the tub as it does the hot water faucet. Left on together, the two faucets take 3 minutes to fill the tub. How long will it take the cold water faucet to fill the tub by itself?
Click here to see answer by ewatrrr(24785)  |
Question 845468: Melina's typing speed is 36wpm. She finishes a job in 5 hours. How long would the same job have taken her if she typed 48wpm?
I tried it like this:
36wpm = 5hrs
12wpm(/3) = 15hrs(*3)
48wpm(*4) = 3.75hrs(/4)
Is there a more reliable solution, one with algebra pehaps?
Click here to see answer by Fombitz(32388)  |
Question 846348: A pump was used to empty a flooded basement. After 3 hours, a second bump was added and the basement was emptied in 8 more hours. The first pump could have done the job alone in 20 hours.How long would it take the second pump to do the job alone?
Click here to see answer by josmiceli(19441)  |
Question 846386: 12 clerks are assigned to enter certain data on index cards. The number of clerks could perform the task in 18 days. After these clerks have worked on this assignment for 6 days, 4 more clerks are added to the staff to do this work. Assuming that all the clerks work at the same rate of speed, how many days will it take to complete the entire task?
Click here to see answer by richwmiller(17219) |
Question 846425: 300 men were engaged to complete a job in certain number of days. but due to another assignment 15 men dropped the 2nd day, 15 more men dropped the 3rd day and so on. it takes 15 more days to finish the work now. find number of days in which work is completed.
solution is 25 but how
Click here to see answer by richwmiller(17219) |
Question 846551: A farmer can plow a field in 9 hours, and his son can do it in 18 hours. After the farmer had plowed it for 3 hours, the boy joined him and together they completed the plowing of the field. How long did it take them?
Click here to see answer by ewatrrr(24785) |
Question 847000: A can do a piece of work in 80 days and B in 64 days and C in 160 days. All begin to do it altogether but A leaves after 20 days and B leaves after 15 days before completion of the work. How long did the work last??
Click here to see answer by josmiceli(19441) |
Question 847302: One worker takes 20 hours to do a job. A second worker can do the same job in 15 hours. When a third worker is a added it take the three of them 6 hours to do the job. How long would it take the third worker to do the job?
Click here to see answer by richwmiller(17219) |
Question 847395: Water is flowing out of a garden hose at a rate of 10 gallons per minute into a circular swimming pool that has a diameter of 16ft. How fast is the water rising in the pool in inches per minute? Hint: The area of a circle is A=πr^2
I'm not sure how to approach this problem, I can find the area but I do not understand how I can convert the rate.
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 847968: When working alone, it takes Roy 6 hours longer to clean their entire house than it does his wife, Betty, when she does it by herself. When they work together, they can clean the entire hour in 4 hours. How long does it take each of them to clean the entire house when they are working alone.
Click here to see answer by richwmiller(17219) |
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