Aptitude - Chain Rule - Discussion
Discussion Forum : Chain Rule - General Questions (Q.No. 1)
1.
3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?
Answer: Option
Explanation:
Let the required number of working hours per day be x.
More pumps, Less working hours per day (Indirect Proportion)
Less days, More working hours per day (Indirect Proportion)
| Pumps | 4 | : | 3 |  |
:: 8 : x |
| Days | 1 | : | 2 |
4 x 1 x x = 3 x 2 x 8
 x = |
(3 x 2 x 8) |
| (4) |
x = 12.
Discussion:
69 comments Page 1 of 7.
Isiko Abudallah said:
6 years ago
Let x be the number of hours taken by the second pump.
A : B
Pump 3 : 4
Days 2 : 1
Hours 8 : x
Hour taken by B,
3*2*8 = 4*1*x.
48 = 4x.
x = 12.
A : B
Pump 3 : 4
Days 2 : 1
Hours 8 : x
Hour taken by B,
3*2*8 = 4*1*x.
48 = 4x.
x = 12.
(48)
Deepesh pathariya said:
1 year ago
3 pumps 8 hours a day empty a tank in 2 days.
Hence 1 pump can empty the tank = 3 * 8 * 2 hours.
= 48 hours.
4 pump can empty the tank = 48/4.
= 12.
Hence 1 pump can empty the tank = 3 * 8 * 2 hours.
= 48 hours.
4 pump can empty the tank = 48/4.
= 12.
(37)
Umesh behera said:
4 years ago
Thank you everyone.
(9)
Rohan said:
5 years ago
Thanks all for explaining the answer.
(7)
Shivam Mehta said:
6 years ago
There is a direct formula m1d1t1w2= m2d2t2w1,
where m1,m2 = no of men case 1,2.
w1,w2= work done in case 1,2.
d1,d2= no of days in case 1,2.
t1,t2= no of hours in case 1,2.
where m1,m2 = no of men case 1,2.
w1,w2= work done in case 1,2.
d1,d2= no of days in case 1,2.
t1,t2= no of hours in case 1,2.
(7)
Mohamed said:
7 years ago
If 38 men, working 6 hours a day, can do a piece of work in 12 days, find the number of days in which 57 men working 8 hours a day, can do twice that piece of work, supposing that two men of the first set do as much work in 1 hour as 3 men of the second set do in 3/2 hours whats the answer for this?
Can Anyone answer for this?
Can Anyone answer for this?
(6)
Monika said:
8 years ago
Please solve my problem.
1200 men 500 women can build a bridge in 2 weeks. 900 men and 250 women will take 3 weeks to build the same bridge. How many men will be needed to build the bridge in one week?
1200 men 500 women can build a bridge in 2 weeks. 900 men and 250 women will take 3 weeks to build the same bridge. How many men will be needed to build the bridge in one week?
(6)
Azar- Benz said:
8 years ago
This question is asked for my interview in Mercedes Benz.
(4)
Juana maria said:
4 years ago
Thanks all. This helped me a lot.
(3)
Eshita said:
4 years ago
I am not able to understand this. Can anyone please explain?
(3)
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