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 2 of 4.
Ruba said:
7 years ago
How to find direct & indirect proportion? Please tell me.
(1)
Lucky said:
10 years ago
40 cows/1 cow = 40 days/1 day (direct proportionate).
Let 40 cows/1 cow = c.
40 days/1 day = d.
c/40 bags = d/x bags.
Putting value of c = 40 & d = 40, we get x = 40;
Question will get rather tough when values differ (say 40 cows, 30 bags, 20 days and we have to find 1 cow to eat 1 bag in how many days.
Solution will be:
c = 40, d = 20 putting in direct relation.
= 40/30 = 20/x.
=> x = 15.
Direct hit method will not be applicable in such type of calculation based method.
Let 40 cows/1 cow = c.
40 days/1 day = d.
c/40 bags = d/x bags.
Putting value of c = 40 & d = 40, we get x = 40;
Question will get rather tough when values differ (say 40 cows, 30 bags, 20 days and we have to find 1 cow to eat 1 bag in how many days.
Solution will be:
c = 40, d = 20 putting in direct relation.
= 40/30 = 20/x.
=> x = 15.
Direct hit method will not be applicable in such type of calculation based method.
Mehar said:
1 decade ago
Simple thing is one 40cows eat 40bags in 40days.
So, that mean 1cow eating 1bag 40days..
I want to solve this problem from reverse...lets think if 1cow eat 1 bag in 1day..for 40days 40cows*40bags=1600.
Now you got it?
So, that mean 1cow eating 1bag 40days..
I want to solve this problem from reverse...lets think if 1cow eat 1 bag in 1day..for 40days 40cows*40bags=1600.
Now you got it?
Yadav said:
1 decade ago
If 1 cow 1 bag in 1 day.
Then 40 cows 40 bags in 1day.
And 40 cows (40*40) bags in 40 days.
Then 40 cows 40 bags in 1day.
And 40 cows (40*40) bags in 40 days.
Navin said:
1 decade ago
If there is any other method, please explain, other than ratio and proportion.
Eedha koushik said:
1 decade ago
I can't understand please explain another method.
Mini said:
1 decade ago
40 cows eat 40 bags in= 40 days
1 cow eat 40 bags in =40*40=1600 days
1 cow eat 1 bag in=1600/40=40 days
1 cow eat 40 bags in =40*40=1600 days
1 cow eat 1 bag in=1600/40=40 days
Naresh said:
1 decade ago
Please explain this problem by other method.
Sowmiya said:
8 years ago
Thanks for the explanation @Saranya.
Moni said:
1 decade ago
Any one explain about direct and indirect methods for three ratio.
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