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:
95 comments Page 9 of 10.
Shawisk said:
1 decade ago
Read carefully
for tanya & sakshi, the actual ratio is 100:75=4:3
bcz if tanya do same work complete @ 100% in x days
then sakshi can complete only 75% of that work in x days
so keep it in mind
for tanya & sakshi, the actual ratio is 100:75=4:3
bcz if tanya do same work complete @ 100% in x days
then sakshi can complete only 75% of that work in x days
so keep it in mind
Satya vaag said:
1 decade ago
Thanks kamlesh.
Harshit said:
1 decade ago
@Vamshidar reddy, Preethy& Samar;.
The answer 16 is justified.
Given that Tanya is more efficient than Sakshi. So, Tanya will take less time to complete the work.
If Tanya is 25% more efficient than Sakshi, it is not nessesary.
That Tanya will complete the work in 25% of the days less than Sakshi.
The answer 16 is justified.
Given that Tanya is more efficient than Sakshi. So, Tanya will take less time to complete the work.
If Tanya is 25% more efficient than Sakshi, it is not nessesary.
That Tanya will complete the work in 25% of the days less than Sakshi.
Samar said:
1 decade ago
20*0.25=5
subtract 5 from 20
20-5=15Ans
I also get the answer 15
I did not understand how the answer is 16.
subtract 5 from 20
20-5=15Ans
I also get the answer 15
I did not understand how the answer is 16.
Xyz said:
1 decade ago
Thanks Kamlesh !!!
Preethy said:
1 decade ago
I too get the answer as 15 days. Since 25% of 20 is 5 we have to subtract like 20-5=15 rite? but how the answer is 16?
Vamshidhar reddy said:
1 decade ago
25% efficient(so one takes 100 days means second person takes 75days[just 75%of 100])
here one takes 20 days
so other takes 20*(75/100)=15 days
here one takes 20 days
so other takes 20*(75/100)=15 days
Chandu said:
2 decades ago
5 : 4 :: 20 : x
Can you explain the meaning of the above line?
Can you explain the meaning of the above line?
Deepti said:
2 decades ago
Thanks sundar that solves so many other related problems.
Kiran Joy said:
2 decades ago
Can't we take time taken by tanya and sakshi as 75:100.
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