Aptitude - Chain Rule - Discussion
Discussion Forum : Chain Rule - General Questions (Q.No. 8)
8.
In a dairy farm, 40 cows eat 40 bags of husk in 40 days. In how many days one cow will eat one bag of husk?
Answer: Option
Explanation:
Let the required number of days be x.
Less cows, More days (Indirect Proportion)
Less bags, Less days (Direct Proportion)
| Cows | 1 | : | 40 |  |
:: 40 : x |
| Bags | 40 | : | 1 |
1 x 40 x x = 40 x 1 x 40
x = 40.
Discussion:
39 comments Page 4 of 4.
Chandan Kumar said:
1 decade ago
Can anyone explain the chain rule in very simple way. How will I write the equation?
Jyoti said:
1 decade ago
Total work of 40 cows for 40 days = 40*40*40.
Work for 1 cow for 40 days = 40*40.
Work for 1 cow for 1 day = 40.
Work for 1 cow for 40 days = 40*40.
Work for 1 cow for 1 day = 40.
Saranya said:
1 decade ago
Its a basic formula,
No.of cows*No.of days/No.of bags
40*40/40 = x*1/1
answer = 40.
No.of cows*No.of days/No.of bags
40*40/40 = x*1/1
answer = 40.
Shrey said:
1 decade ago
Very simple:
40 cows eat 40 bags in 40 days!
Now in 1 day they eat 1 bag. i.e.40 cows eat 1 bag in 1 day.
Hence 1 cow will eat 1 bag in 40 days!!!!!
40 cows eat 40 bags in 40 days!
Now in 1 day they eat 1 bag. i.e.40 cows eat 1 bag in 1 day.
Hence 1 cow will eat 1 bag in 40 days!!!!!
Rupinderjit said:
1 decade ago
40C-40D----40B
1C-1D----(40B/(40C*40D))
i.e. 1C-1D----1/40B
Now since 1 cow in 1 day consume 1/40 bags,that means
1/40B consumed in- 1Dday by cow is- 1
So 1B in 1D is 1/(1/40)==40 days
1C-1D----(40B/(40C*40D))
i.e. 1C-1D----1/40B
Now since 1 cow in 1 day consume 1/40 bags,that means
1/40B consumed in- 1Dday by cow is- 1
So 1B in 1D is 1/(1/40)==40 days
Ridhi said:
1 decade ago
40 cows eat 40 bags in 40 days
40 cows eat 1 bag in 1 day
1 cow eat1/40 bags in 1day
40 cows eat 1 bag in 1 day
1 cow eat1/40 bags in 1day
Deepak Varshney said:
1 decade ago
40 cows eat 40 bags in 40 days
40 cows eat 40/40 bags in 1 days (i.e.40 cows eat 1 bags in 1 days)
therefore,
1 cow eat 1/40 bags in 1day
and
1 cow eat 1 bags in 40 day
Holy cowwa cowwa!!!
40 cows eat 40/40 bags in 1 days (i.e.40 cows eat 1 bags in 1 days)
therefore,
1 cow eat 1/40 bags in 1day
and
1 cow eat 1 bags in 40 day
Holy cowwa cowwa!!!
Ashis said:
1 decade ago
@mini. Yaar you are explaining superly. Thanks a lot.
Abhi said:
1 decade ago
40 cows eat 40 bags in 1 day
Therefore work done by 40 cows = 40/40 = 1
work done by 1 cow = 1/40
Therefore 1 cow can do 1/40 of whole work
Hence 1/40 + 1/40 + 1/40.....40 times = 1 that is the whole work
Therefore 1 cow will take 40 days to eat 1 bag.
Therefore work done by 40 cows = 40/40 = 1
work done by 1 cow = 1/40
Therefore 1 cow can do 1/40 of whole work
Hence 1/40 + 1/40 + 1/40.....40 times = 1 that is the whole work
Therefore 1 cow will take 40 days to eat 1 bag.
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