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Sashi can do a piece of work in 25 days and Rishi can do it in 20 days. They work for 5 days andthen Sashi goes away. In how many more days will Rishi finish the work?
- a)10 days
- b)12 days
- c)14 days
- d)None of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Sashi can do a piece of work in 25 days and Rishi can do it in 20 days...
Sashi = 4%, Rishi = 5%. In five days, they do a total of 45% work. Rishi will finish the remaining
55% work in 11 more days.
55% work in 11 more days.
Most Upvoted Answer
Sashi can do a piece of work in 25 days and Rishi can do it in 20 days...
Given:
Sashi can do the work in 25 days
Rishi can do the work in 20 days
They worked together for 5 days
To find:
In how many more days will Rishi finish the work?
Solution:
Let's assume that the total work is 100 units.
So, Sashi can do 4 units of work in a day, and Rishi can do 5 units of work in a day.
In the first 5 days, the total work done by Sashi and Rishi together is:
Sashi's work = 4 units/day * 5 days = 20 units
Rishi's work = 5 units/day * 5 days = 25 units
Total work done = 20+25 = 45 units
Remaining work = 100 - 45 = 55 units
Now, only Rishi is working on the remaining work. So, the time taken by Rishi to complete the remaining work will be:
Time = Remaining work / Rishi's efficiency
Time = 55 units / 5 units/day = 11 days
Therefore, the total time taken by Rishi to complete the work is:
Time taken = 5 days (when Sashi and Rishi worked together) + 11 days (when only Rishi worked)
= 16 days
Hence, the correct answer is option D, none of these.
Sashi can do the work in 25 days
Rishi can do the work in 20 days
They worked together for 5 days
To find:
In how many more days will Rishi finish the work?
Solution:
Let's assume that the total work is 100 units.
So, Sashi can do 4 units of work in a day, and Rishi can do 5 units of work in a day.
In the first 5 days, the total work done by Sashi and Rishi together is:
Sashi's work = 4 units/day * 5 days = 20 units
Rishi's work = 5 units/day * 5 days = 25 units
Total work done = 20+25 = 45 units
Remaining work = 100 - 45 = 55 units
Now, only Rishi is working on the remaining work. So, the time taken by Rishi to complete the remaining work will be:
Time = Remaining work / Rishi's efficiency
Time = 55 units / 5 units/day = 11 days
Therefore, the total time taken by Rishi to complete the work is:
Time taken = 5 days (when Sashi and Rishi worked together) + 11 days (when only Rishi worked)
= 16 days
Hence, the correct answer is option D, none of these.
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Community Answer
Sashi can do a piece of work in 25 days and Rishi can do it in 20 days...
Sashi one day work 1/25 and Rishi one day work is 1/20. they work together for 5 day (1/25+1/20)×5 =9/20. remaining work will be (1-9/20)= 11/20. Rishi will do the remaining work.11/20÷1/20 =11day
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Sashi can do a piece of work in 25 days and Rishi can do it in 20 days. They work for 5 days andthen Sashi goes away. In how many more days will Rishi finish the work?a)10 daysb)12 daysc)14 daysd)None of theseCorrect answer is option 'D'. Can you explain this answer?
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