Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 20)
20.
Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:
Answer: Option
Explanation:
Ratio of times taken by Sakshi and Tanya = 125 : 100 = 5 : 4.
Suppose Tanya takes x days to do the work.
5 : 4 :: 20 : x  x = |
 |
4 x 20 |  |
| 5 |
x = 16 days.
Hence, Tanya takes 16 days to complete the work.
Discussion:
94 comments Page 5 of 10.
Ramesh said:
1 decade ago
Sakshi's one day work is 1/20.
Tanya is 25% of sakshi it means 1/20+25%1/20.
= (1/20+25/100*1/20).
= (1/20+1/80).
= 1/16 for one day.
So 16 days to do total work.
Tanya is 25% of sakshi it means 1/20+25%1/20.
= (1/20+25/100*1/20).
= (1/20+1/80).
= 1/16 for one day.
So 16 days to do total work.
Kamlesh jaiswal said:
1 decade ago
The given answer is correct.
Sakshi's one day work=1/20
Tanya's one day work =(1/20 + 25% of 1/20) = 1/20+1/80 = 1/16.
So Tanya can complete the work in 16 days.
Sakshi's one day work=1/20
Tanya's one day work =(1/20 + 25% of 1/20) = 1/20+1/80 = 1/16.
So Tanya can complete the work in 16 days.
(1)
Sandeep said:
1 decade ago
(1/20 + 25% of 1/20).
Here 25 % of 1/20 is 1/5.
Then add,
(1/20+1/5), we get,
(1+4/20).
Then we get 1/4.
Above we got 4 days, then subtract 20 from 4
20-4 = 16.
Here 25 % of 1/20 is 1/5.
Then add,
(1/20+1/5), we get,
(1+4/20).
Then we get 1/4.
Above we got 4 days, then subtract 20 from 4
20-4 = 16.
Dhiman saab said:
1 decade ago
@Chandu.
It means 5:4 is known 125:100.
:: may mean equal to
20 here is the number of days taken by Sakshi and we are supposing x to be the days taken by Tanya.
It means 5:4 is known 125:100.
:: may mean equal to
20 here is the number of days taken by Sakshi and we are supposing x to be the days taken by Tanya.
Vishal Bhadikar said:
7 years ago
Why not 15 days? Explain..
100%=20 day.
25%=x day.
X = 5 days.
Now take efficient that we need to subtract 20-5 = 15 days.
Explain to me if I am wrong.
100%=20 day.
25%=x day.
X = 5 days.
Now take efficient that we need to subtract 20-5 = 15 days.
Explain to me if I am wrong.
(2)
Shravani said:
1 decade ago
If tanya is 25% more efficient than sakshi (which means tanya>sakshi) then how cum the ratio between sakshi n tanya is 125:100 it should be 100:125 right?.
Leela said:
6 years ago
@Ashan Naveed.
Consider 100 unit by Sakshi
Tanya 125 unit. Y can't we consider Sakshi by 125 days. Tanya in 100 days. Mainly unitary method how can we solve.
Consider 100 unit by Sakshi
Tanya 125 unit. Y can't we consider Sakshi by 125 days. Tanya in 100 days. Mainly unitary method how can we solve.
(1)
Deepak khandagale said:
8 months ago
Sakshi completed the task in 20.
Tanya is 25% more efficient than Sakshi,
So 20/25= 0.8,
0.8 * 20 = 16,
So, Tanya takes 16 days to complete the whole task.
Tanya is 25% more efficient than Sakshi,
So 20/25= 0.8,
0.8 * 20 = 16,
So, Tanya takes 16 days to complete the whole task.
(2)
Sandeep said:
1 decade ago
If tanya is 25% more efficient than sakshi (whic means tanya>sakshi) then how cum the ratio between sakshi n tanya is 125:100 it should be 100:125 right?.
Moses said:
8 years ago
15 is the answer because we are reducing Sakshi's work time by 25% Hence multiply 20 days by 0.75 which will give 15days.
15 days is definitely the answer.
15 days is definitely the answer.
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