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 7 of 10.
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.
Epsilon said:
8 years ago
Sakshi does 1 unit in =20Days.
Tanya does (1+1/4)=5/4 unit in = 20Days.
So, Tanya does one unit in=20*4/5 = 16 days,
I think efficiency here is related to the amount of work done.
Tanya does (1+1/4)=5/4 unit in = 20Days.
So, Tanya does one unit in=20*4/5 = 16 days,
I think efficiency here is related to the amount of work done.
Sanjay said:
8 years ago
Tanya 1 day =100 unit (make).
Sakshi 1 day =75 unit.
Sakshi 20 days = 1500 unit make ( so this is total work ).
Then tanya make = 1500 / 100 = 15 days.
15 days 1500 unit.
15 --> Can Be Answer.
Sakshi 1 day =75 unit.
Sakshi 20 days = 1500 unit make ( so this is total work ).
Then tanya make = 1500 / 100 = 15 days.
15 days 1500 unit.
15 --> Can Be Answer.
Mithun said:
8 years ago
[Tanya effective than sakshi [20days] , hence answer should be less than 20days]
Sakshi 125--------->20
Tanya 100-------->?
[cross multiply]
20 x 100 / 125 =16days.
Sakshi 125--------->20
Tanya 100-------->?
[cross multiply]
20 x 100 / 125 =16days.
Atul said:
8 years ago
Sakshi cannot be taken as 125, as Sakshi is the reference point here, she must be taken as 100.
So, Tanya becomes 75 (25% more efficient).
Then the ratio becomes 4:3 instated of 5:4.
So, Tanya becomes 75 (25% more efficient).
Then the ratio becomes 4:3 instated of 5:4.
Sahithikarne said:
8 years ago
25% of 20 is 5 then the answer is 20-5=15. But how it is 16?
Mahesh Neupane said:
8 years ago
Sakshi efficiency is 1/20.
Tanya Efficiency is 25% more than Sakshi.
So, 1/20+(25%of1/20)=16%.
Tanya Efficiency is 25% more than Sakshi.
So, 1/20+(25%of1/20)=16%.
Patrick said:
8 years ago
Sakshi efficiency = 100/20 = 5;
Tanya = 5 x 1.25 = 6.25;
The number of days taken by Tanya to do the same piece of work is: 100/6.25 = 16 days.
Tanya = 5 x 1.25 = 6.25;
The number of days taken by Tanya to do the same piece of work is: 100/6.25 = 16 days.
Manish Niroti said:
8 years ago
Tanya & sakshi capacity =5:4.
Tanya & Sakshi time taken=4:5.
If Sakshi taking 20 days it means 5 is representing 20 so 20/5 =4,
and multiply 4 with taken by Tanya so you will get 4*4 =16.
Ratio and proportion concept.
Tanya & Sakshi time taken=4:5.
If Sakshi taking 20 days it means 5 is representing 20 so 20/5 =4,
and multiply 4 with taken by Tanya so you will get 4*4 =16.
Ratio and proportion concept.
(1)
Komal Singh said:
7 years ago
@Sakshi.
If takes 125 times to complete her work in 20 days, Tanya takes 100.
Therefore if we cross multiply to find how much days will Tanya take to complete work.
i.e 125/100*20/? we get 16!
If takes 125 times to complete her work in 20 days, Tanya takes 100.
Therefore if we cross multiply to find how much days will Tanya take to complete work.
i.e 125/100*20/? we get 16!
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