Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 15)
15.
10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?
Answer: Option
Explanation:
| 1 woman's 1 day's work = | 1 |
| 70 |
| 1 child's 1 day's work = | 1 |
| 140 |
| (5 women + 10 children)'s day's work = |  |
5 | + | 10 |  |
= | |
1 | + | 1 | |
= | 1 |
| 70 | 140 | 14 | 14 | 7 |
5 women and 10 children will complete the work in 7 days.
Discussion:
47 comments Page 3 of 5.
Mahesh said:
1 decade ago
10 women's one day work =1/7
So 5 women's one day work=1/14
and 10 child's one day work =1/14
So 5 women's and 10 childrens one day work is
= 1/14 + 1/14
= 2/14
= 1/7
Ans: 7 days.
So 5 women's one day work=1/14
and 10 child's one day work =1/14
So 5 women's and 10 childrens one day work is
= 1/14 + 1/14
= 2/14
= 1/7
Ans: 7 days.
Rajbir said:
5 years ago
10 w = 7 days ---> (1)
10 c= 14 days
1w = 2c.
1c=1/2w.
We have to put in this;
5w+10c=?.
5w+10(1/2 )w=?.
5w+5w=?.
Therefore from equation 1 put the value of 10 women;
10w = 7 days.
10 c= 14 days
1w = 2c.
1c=1/2w.
We have to put in this;
5w+10c=?.
5w+10(1/2 )w=?.
5w+5w=?.
Therefore from equation 1 put the value of 10 women;
10w = 7 days.
(10)
Kamlesh jaiswal said:
1 decade ago
10 women's one day work =1/7
So 1 women's one day work =1/70
So 5 women's one day work =5*1/70
Similarly,
1 child's one day work = 1/140
and 10 child's one day work = 10/140
So 1 women's one day work =1/70
So 5 women's one day work =5*1/70
Similarly,
1 child's one day work = 1/140
and 10 child's one day work = 10/140
Sandeep said:
9 years ago
10 women work = 1/7 = 5womens can doing(1/3.5).
10 boys work = 1/14.
So we want 5womens + 10 boys work = 5 * (1/3.5) + 10(1/14).
Solving we can get answer approximately 7.
10 boys work = 1/14.
So we want 5womens + 10 boys work = 5 * (1/3.5) + 10(1/14).
Solving we can get answer approximately 7.
Sekhar said:
10 years ago
10 women 1 day work = 1/7.
1 women 1 day = 1/70.
Like wise 1 child 1 day work = 1/ 140.
5 women + 10 children can do work in?
= 1/70*5+1/140*10 = 1/14+1/14 = 7 days.
1 women 1 day = 1/70.
Like wise 1 child 1 day work = 1/ 140.
5 women + 10 children can do work in?
= 1/70*5+1/140*10 = 1/14+1/14 = 7 days.
(1)
Rox said:
1 decade ago
10 women in 7 days.
5 women(A) in 14 days.
A = (1/14).
10 child(B) in 14 days(given).
B = (1/14).
A+B = (1/14+1/14) = 2/14 = 1/7.
That is 7 days.
5 women(A) in 14 days.
A = (1/14).
10 child(B) in 14 days(given).
B = (1/14).
A+B = (1/14+1/14) = 2/14 = 1/7.
That is 7 days.
Shiva said:
1 decade ago
10 children 14 days.
20 children 7 days.
=> 1w = 2c.
=> 10c = 5w.
=> 5w+10c = 5w+5w = 10W.
So 10w complete in 7 days given in question.
20 children 7 days.
=> 1w = 2c.
=> 10c = 5w.
=> 5w+10c = 5w+5w = 10W.
So 10w complete in 7 days given in question.
Sai krupa said:
1 decade ago
Its always better to take LCM for the total times which gives the total amount of work. So then solve the sum its so simple.
Suraj dev said:
9 years ago
It has simple formula.
a = 10, x = 7, b = 10, y = 14, c = 5, d = 10.
No of days = 1/((c/ax) + (d/by)).
Ans = 7 days.
a = 10, x = 7, b = 10, y = 14, c = 5, d = 10.
No of days = 1/((c/ax) + (d/by)).
Ans = 7 days.
Chahat Mishra said:
6 months ago
Very easy approach;
10W = 1/7
2(5W) = 1/7
5W = 1/14
Already given 10C = 1/14
5W + 10C = (1/14+1/14) = 1/7
Answer: 7.
10W = 1/7
2(5W) = 1/7
5W = 1/14
Already given 10C = 1/14
5W + 10C = (1/14+1/14) = 1/7
Answer: 7.
(2)
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