Drinking water

A man drinks a keg of water in 40 days, and a woman drinks in 62 days. How many days do they consume a keg together?

Correct result:

x =  24.3137 d

Solution:

$$\begin{gathered} x\cdot (1\mathrm{/}40+1\mathrm{/}62)=1 \\ 51x=1240 \\ x={\displaystyle \frac{1240}{51}}\doteq 24.313725=24.3137\text{ d} \end{gathered}$$

Try another example

Showing 0 comments:

Next similar math problems:

• Two rooms
  Woman cleans the room in 30 minutes a man in 90 minutes. How long will take they clean two rooms?
• Working together
  One worker performs work in 3 days, the second in 5 days. How much do they work together?
• Working together
  One painter paint the nursery in 10 days, the second in 8 days. How many days will the nursery be painted if they work together?
• Two workers
  One worker needs 40 hours to do a job, and the second would do it in 30 hours. They worked together for several hours, then the second was recalled, and the first completed the job itself in 5 hours. How many hours did they work together, and how much did
• Working together
  Two people will do the work in 12 days. They worked together for 8 days. Then only one worked for 10 days. How many days would each of them do the work if he worked alone?
• Workers
  Workers A and B will done work together for 15 days. They worked together 13.5 days. Then A worker became ill and worker B finish the job alone for 7.5 days. If every worker was working alone, how many days took whole work for worker A and B?
• Two companies
  The family ordered two companies to modify the garden. The first would be done in 20 days, the second would take 40% less time. How long will they work together if the second company started working when the first worked for 4 days?
• Reading records
  Lucy, Tereza, and Petra decided to compile the compulsory reading records together. It would take 30 days for Lucia alone, 36 for Tereza and 45 for Petra. How long will it take to make records if they will work together?
• Workers
  Two workers fulfill a certain task when working together for 5 days, the first if he worked himself done work in 13 days. How many days will do whole job a second worker?
• Mason with assistant
  Mason had to complete the work in 10 days. Two and a half days later his assistant arrived. Together they completed the work in next three and a half days. How many days would he need an assistant for the same work?
• Painters
  The first team of painters would paint bridge in 15 days, the second in 10 days. After 3 days of working together second team goes out and continue only first team. How many days took second team to finish painting the bridge?
• Two valves
  Water fill the pool by two valves for 11 days. After 7 days the first valve was stopped and the second valve fill pool for 7 days. How many days took to fill the pool each of the valves individually?
• Water reservoir
  One drain hole emptied the water from the tank for 20 hours, with the second drain for 30 hours. How long will the water drain from this tank if we open two drains simultaneously?
• Panel house
  The construction company has two groups of workers. Group A has more members than B. Panel house was insulated by group A in 10 days. The same block of flats was insulated together in 6 days. How many days would group B block insulate?
• Cleaners
  Milan would clean up the room for 2.5 hours, Eric would take 10 hours. How long they swept the room together?
• Performance
  Two masons with the same performance would have made of plaster for 6 days. One of them, however, has increased its daily performance by 50%. How long would take they now to make plaster together?
• Repairman
  Repairman has vowed to do repair work at the plant for 25 days. However work had to be shortened, and therefore he took helper worker. Together they made all the corrections for the whole days. How long it would take work to helper worker?