Question:Twenty-four men can complete a work in sixteen days.Thirty-two women can complete the same work in twenty-four days.Sixteen men and sixteen women started working for twelve days.How many more men are to be added to complete the work remaining work in 2 days?
- 16
- 24
- 36
- 48
- 54
Approach Solution 1
First, determine the pace at which men and women complete their work.
The task is finished in 16 days by 24 workers.
The identical task can be finished by 32 women in 24 days.
As a result, it will take 32 days to finish the work with 24 ladies.
The same number of women work at half the pace because they take twice as long (16 vs. 32 days).
Thus, in terms of labor, 16 women are equal to 8 males.
24 men = 16 +8
then begin to labor and do so for 12 days. They finish the job in 16 days, leaving them with 4 more days to finish. But we'll need twice as many workers if we want them to finish the job in only two days. Therefore, we still need 24 men.
B is the correct answer.
Approach Solution 2
Because 24 men may finish a task in 16 days, their rate is 1/16; hence, the rate of 1 man is (1/16)/24, or 1/384. Similar to this, 32 women may finish the identical task in 24 days; their rate is 1/24, and as a result, the rate for one woman is (1/24)/32, or 1/768. The rate is therefore 16 x (1/384) + 16 x (1/768) = 1/24 + 1/48 = 2/48 + 1/48 = 3/48 = 1/16 for 16 males and 16 women.
These 16 men and 16 women finished 3/4 of the job because they worked for 12 days, or (1/16) times 12 = 12/16.
As a result, only one-fourth of the work remains. Given that each guy works at a pace of 1/384 and the existing 16 men and 16 women work at a rate of 1/16, we can use the formula below to determine how many more men are required to finish the remaining work in 2 days:
n(1/384)(2) + (1/16)(2) = ¼
n/192 + 1/8 = ¼
n/192 = 1/8
8n = 192
n = 24
B is the correct answer.
Approach Solution 3
The rate of work for men and women should be similar. be, respectively, x and y.
As stated by the formula 24*16*x = z
32*24*y = z
Consequently, x = 2y and 24*16*x = 32*24*y.
12 days of work equals (16x + 16y)12 = (32y + 16y) 12 = 48*12y = 24*24y
Work Left = 32 * 24 * 24 * 8 * 24
(Number of men added rate + current workers rate)*2 = Work Left
or (N*x + 16x + 16y)*2 = 8*24y
calculating x=2y
4*24y = 2Ny+48y
2Ny = 48y
or N = 24.
The appropriate answer is B.
“Twenty-four men can complete a work in sixteen days.Thirty-two women can complete the same work in twenty-four days" - is a topic of the GMAT Quantitative reasoning section of GMAT. This question has been borrowed from the book “GMAT Official Guide Quantitative Review”.
To understand GMAT Problem Solving questions, applicants must possess fundamental qualitative skills. Quant tests a candidate's aptitude in reasoning and mathematics. The GMAT Quantitative test's problem-solving phase consists of a question and a list of possible responses. By using mathematics to answer the question, the candidate must select the appropriate response. The problem-solving section of the GMAT Quant topic is made up of very complicated math problems that must be solved by using the right math facts.
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