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 1 of 4.
Ashwani said:
6 years ago
M1D1 / W1 = M2D2 / W2.
(40cow x 40 days )/ 40 bag = (1Cow x D days)/ 1 bag.
(40 x 40)/40 =( 1 x D)/1.
40 = D.
(40cow x 40 days )/ 40 bag = (1Cow x D days)/ 1 bag.
(40 x 40)/40 =( 1 x D)/1.
40 = D.
(15)
Anomie said:
6 years ago
EASIEST METHOD:
First, we fix the data 40 days:
40 cows ----> 40 bags
1 cow -----> ? bags
? = 40 ÷ 40
=1 bag.
40 days ----> 1 bag
1 day -----> ? bag
? = 1 ÷ 40.
= 1/40 bag.
1 day ------> 1/40 bag.
? day -------> 1 bag.
? = 1 ÷ 1/40.
= 40 days.
First, we fix the data 40 days:
40 cows ----> 40 bags
1 cow -----> ? bags
? = 40 ÷ 40
=1 bag.
40 days ----> 1 bag
1 day -----> ? bag
? = 1 ÷ 40.
= 1/40 bag.
1 day ------> 1/40 bag.
? day -------> 1 bag.
? = 1 ÷ 1/40.
= 40 days.
(9)
Magnesh said:
8 years ago
No equations nothing required, simple understanding
For better connection with the question, lets take boys and rice bags instead of cows and husk bags.
40 boys eat 40 bags of rice in 40 days
the gang of 40 boys eat 1 bag in 1 day
" " 40 boys eat 2 bags in 2 days
" " " " " 3 bags in 3 days
Similarly, group of 40 boys eats 40 bags in 40 days.
Think if 39 people are not there 1 boy can't eat 1 bag in 1 day it takes 40days for him to complete,
As good as saying 1 boy will take 40 days to eat 1 bag.
For better connection with the question, lets take boys and rice bags instead of cows and husk bags.
40 boys eat 40 bags of rice in 40 days
the gang of 40 boys eat 1 bag in 1 day
" " 40 boys eat 2 bags in 2 days
" " " " " 3 bags in 3 days
Similarly, group of 40 boys eats 40 bags in 40 days.
Think if 39 people are not there 1 boy can't eat 1 bag in 1 day it takes 40days for him to complete,
As good as saying 1 boy will take 40 days to eat 1 bag.
(7)
Tanishka bansla said:
2 years ago
@All.
In this type of question, we remember that work done always comes in denominator.
So, 40*40÷40= 1*D÷1,
Gives 40 as answer.
In this type of question, we remember that work done always comes in denominator.
So, 40*40÷40= 1*D÷1,
Gives 40 as answer.
(6)
Trushi said:
4 years ago
I am not getting this. Please, anyone, help me to get this.
(5)
Aadarsh said:
5 years ago
Nice Explanation. Thanks @Ashwini.
(3)
Smitha said:
1 decade ago
40cows:40bags:40days = 1cow:1bag:xdays.
=>40:40:40=1:1:x.
=>40/40:40=1/1:x.
=>1:40=1:x.
=>x=40.
=>40:40:40=1:1:x.
=>40/40:40=1/1:x.
=>1:40=1:x.
=>x=40.
(2)
Ayushman gautam said:
7 years ago
How it is possible for that 40 cows to take time 40 days, 1 cow is also 40 days?
So, according to me, it is option B.
So, according to me, it is option B.
(2)
Mini said:
8 years ago
What if the cow eats more than its share of husk?
(2)
Bharathi said:
4 years ago
Still, I can't understand this. Anyone explain me.
(1)
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