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 7 of 9.
Durga said:
1 decade ago
There are 150 men and they have food for 45 days.
So available food = 150*45 = 6750.
After 10 days 25 men left.
So food consumed for 10 days 150*10 = 1500.
Now avail food = 6750-1500 = 5250.
Avail food = 5250 and there are 125 men.
So this food avail for = 5250/125 = 42 days.
So available food = 150*45 = 6750.
After 10 days 25 men left.
So food consumed for 10 days 150*10 = 1500.
Now avail food = 6750-1500 = 5250.
Avail food = 5250 and there are 125 men.
So this food avail for = 5250/125 = 42 days.
Ekta said:
1 decade ago
Good explation vikas. Thanks.
Sakthi said:
1 decade ago
Very good explain vikas. Thank you.
Vabs said:
1 decade ago
@ vikas
Nice technique
Nice technique
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!
Sita said:
1 decade ago
@vikas
Nice way of explaining.
Nice way of explaining.
Sugan said:
1 decade ago
Great rahul your very right.
Yogendra said:
1 decade ago
Hi, saleh in direct proportion we compare ist to last value &in indirect proportion we take last to 1st Ex-less men,more days(indirect prop.) 125:150
Ajay Kumar said:
1 decade ago
Vikas's method is excellent.
Saleh said:
1 decade ago
Thanks vikas. But any one help - How find out direct and in direct proportion?
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