40 men can complete a piece of work in 15 days. 20 more men ...

40 men can complete a piece of work in 15 days. 20 more men joined them after 5 days they start doing work. How many days will be required by them to finish the remaining work ?

Course Name: Quantitative Aptitude

1]
${ \text{7}}\frac{2}{3}{ \text{ days}}$
2]
${ \text{6}}\frac{1}{5}{ \text{ days}}$
3]
${ \text{8}}\frac{1}{4}{ \text{ days}}$
4]
${ \text{6}}\frac{2}{3}{ \text{ days}}$

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1 Discuss	45 men can complete a piece of work in 16 days. Four days they started working , 36 more men joined them. How many days will they take to complete the remaining work ? 1] 6 days 2] 8 days 3] ${ \text{6}}\frac{2}{3}{ \text{ days}}$ 4] ${ \text{7}}\frac{3}{4}{ \text{ days}}$ Solution
10 Discuss	A single person takes 10 minutes to stitch a bag. If from 10.00 a.m. to 12.30 p.m., 1245 bags are to be stitched how many persons should be employed on this job? 1] 81 2] 82 3] 83 4] 84 Solution
2 Discuss	A can build up a wall in 8 days while B can break it in 3 days. A has worked for 4 days and then B joined to work with A for another 2 days only. In how many days will A alone build up the remaining part of the wall ? 1] ${ \text{6}}\frac{1}{3}{ \text{ days}}$ 2] 7 days 3] ${ \text{7}}\frac{1}{3}{ \text{ days}}$ 4] ${ \text{13}}\frac{1}{3}{ \text{ days}}$ Solution
3 Discuss	25 men with 10 boys can do in 6 days as much work as 21 men with 30 boys can do in days. How many boys must help 40 men to do the same work in 4 days ? 1] 5 2] 10 3] 20 4] 40 Solution
4 Discuss	A work could be completed in 100 days by some workers. However, due to the absence of 10 workers, it was completed in 110 days. The original number of workers was ? 1] 100 2] 110 3] 55 4] 50 Solution
5 Discuss	X can copy 80 pages in 20 hours, x and y together can copy 135 pages in 27 hours. Then y can copy 20 pages in ? 1] 20 hours 2] 24 hours 3] 3 hours 4] 12 hours Solution
6 Discuss	10 men working 6 hours a day can complete a work in 18 days. How many hours a day must 15 men work to complete the same work in 12 days ? 1] 6 hours/day 2] 10 hours/day 3] 12 hours/day 4] 15 hours/day Solution
7 Discuss	Three men A, B, C working together can do a job in 6 hours less time than A alone, in one hour less time than B alone and in one half the time needed by C when working alone. Then A and B together can do the job in: 1] $\frac{2}{3}$ hours 2] $\frac{3}{4}$ hours 3] $\frac{3}{2}$ hours 4] $\frac{4}{3}$ hours Solution
8 Discuss	A job can be complete by 12 men in 12 days. How many extra days will be needed to complete the job if 6 men leave after working for 6 days ? 1] 3 days 2] 6 days 3] 12 days 4] 24 days Solution
9 Discuss	A can do $\frac{1}{3}$ rd of work in 5 days and B can do the do $\frac{2}{5}$ th of this work in 10 days. Both A and B, together can do the work in? 1] ${ \text{ 7}}\frac{3}{8}{ \text{ days}}$ 2] ${ \text{8}}\frac{4}{5}{ \text{ days}}$ 3] ${ \text{9}}\frac{3}{8}{ \text{ days}}$ 4] 10 days Solution
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