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Oliveboard Question of the day
Question: 12 women can complete a work in N days. 7 men can finish the same work in (N+9) days. The time taken by 9 women to complete the work is 2/3 times the time taken by 5 men to complete the work. Find the value of N.
Answer Options:
(1) 18
(2) 21
(3) 25
(4) 28
(5) 24
Solution posted below. Click on the plus sign to view the solution.
Answer and Explanation
Answer key: 2 Solution:
The time taken by 9 women to complete the work is 2/3 times the time taken by 5 men to complete the work.
It means efficiency of 9 women = 3/2 times the efficiency of 5 men
Efficiency of 6 women = Efficiency of 5 men
Let a man do 6k units of work in a day.
Then, a woman does 5k units of work in a day.
12 women can complete the work in N days and 7 men in (N+9) days.
Hence, total work = 12 x 5k x N = 7 x 6k x (N+9)
60kN = 42k(N+9)
60N = 42N + 378
18N = 378
N = 21 days
2) 21
N = 21 Days
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21 is the value of N
Option No 2 i.e 21 days
21
(2)
21
21 days
21 Days
21
21
Ans: Option B) 21 days
21
21 days
2) 21
21 days
21 days
21 days
21 days
21
21 days option 2)
21 days
2. 21
(2) 21 DAYS
Answer is (2) it means 21 days.
21 days
2) 21 days.
2) 21 Days
2)21 days
2) 21 days
21days
21 days
Option 2: 21
B.21
12n/9=2/3{7(n+9)/5}
~n=21
option (2):21
Option (2):21