Aptitude - Chain Rule - Discussion
Discussion Forum : Chain Rule - General Questions (Q.No. 4)
4.
A fort had provision of food for 150 men for 45 days. After 10 days, 25 men left the fort. The number of days for which the remaining food will last, is:
Answer: Option
Explanation:
After 10 days : 150 men had food for 35 days.
Suppose 125 men had food for x days.
Now, Less men, More days (Indirect Proportion)
125 : 150 :: 35 : x 
125 x x = 150 x 35
 x = |
150 x 35 |
| 125 |
x = 42.
Discussion:
82 comments Page 4 of 9.
Uttam said:
1 decade ago
No. of men =>(1/no of days), that is inversely proportional.
We can write,
m=>1/d
So,
(150/125)=(x/35)
x=42 days.
We can write,
m=>1/d
So,
(150/125)=(x/35)
x=42 days.
Mugdha said:
8 years ago
My que is that if x men consume x kg of food in x days, then why men will consume why kg of food in ? how many days?
Tushar said:
1 decade ago
HI,
I am always confused to solve time and work questions, so please help me to solve this problem in easy way.
I am always confused to solve time and work questions, so please help me to solve this problem in easy way.
Star said:
8 years ago
What if the question had been how many more days the food lasts? Then would the answer be 42-35 = 7 more days.
Siddharth said:
8 years ago
@Liza.
1 student has provision for 150 x 45 days.
125 students have provision for 150 x 45 / 125 = 54 days.
1 student has provision for 150 x 45 days.
125 students have provision for 150 x 45 / 125 = 54 days.
Nithin said:
1 decade ago
@rahul after 10 days 25 men will leave, so how come we can take as 150? we must take it as 125 right!
Mandeep kaur said:
1 decade ago
(150*45-150*10)/125.
After solving this we get answer is negative. That is not exist.
After solving this we get answer is negative. That is not exist.
Manisha said:
1 decade ago
I can't understand to this example please can you explain how to solve this example?
Sankalp said:
4 years ago
150 * (45-10) = (150-25) * X,
150 * 35 = 125 * X,
X = 150 * 35 ÷ 125 ,
X = 42.
150 * 35 = 125 * X,
X = 150 * 35 ÷ 125 ,
X = 42.
(5)
Saleh said:
1 decade ago
Thanks vikas. But any one help - How find out direct and in direct proportion?
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