25 men with 10 boys can do in 6 days as much work as 21 men ...

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 ?

Course Name: Quantitative Aptitude

1] 5
2] 10
3] 20
4] 40

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1 Discuss	If 4 men or 6 women can do a piece of work in 12 days working 7 hours a day, how many days will it take to complete a work twice as large with 10 men and 3 women working together 8 hours a day ? 1] 6 days 2] 7 days 3] 8 days 4] 10 days Solution
10 Discuss	X alone can complete a piece of work in 40 days. He worked for 8 days and left. Y alone completed the remaining work in 16 days. How long would X and Y together take to complete the work ? 1] $13\frac{1}{3}{ \text{days}}$ 2] 14 days 3] 15 days 4] $16\frac{2}{3}{ \text{days}}$ Solution
2 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
3 Discuss	While working 7 hour a day, A alone can complete a piece of work in 6 days and B alone in 8 days. In what time would they complete it together, 8 hour a day? 1] 3 days 2] 4 days 3] 2.1 days 4] 3.6 days Solution
4 Discuss	A man is twice as fast as a women and a woman is twice as fast as a boy in doing a work. If all of them, a man , a woman and a boy can finish the work in 7 days, a boy will do it alone ? 1] 49 days 2] 7 days 3] 6 days 4] 42 days Solution
5 Discuss	A can do a work in 10 days. The efficiency of A is 20% less than B. How many days B need to finish the same work? 1] 8.5 days 2] 12.3 days 3] 8 days 4] 7.5 days Solution
6 Discuss	6 men can complete a piece of work in 12 days, 8 women can complete the same piece of work in 18 days and 18 children can do it in 10 days. 4 men, 12 women and 20 children do the work for 2 days. If the remaining work be completed by men only in 1 day, how many men will be required ? 1] 36 2] 24 3] 18 4] Cannot be determined Solution
7 Discuss	A and B together can do a job in 2 days; B and C can do it in 4 days; A and C in ${ \text{2}}\frac{2}{5}$ days. The number of days required for A to do the job alone is = ? 1] 1 2] 3 3] 6 4] 12 Solution
8 Discuss	16 women take 12 days to complete a work which can be completed by 12 men in 8 days. 16 men started working and after 3 days 10 men left and 4 women joined them. How many days will they take to complete the remaining work ? 1] 4 days 2] 6 days 3] 8 days 4] 10 days Solution
9 Discuss	4 mat-weavers can weave 4 mats in 4 days. At the same rate how many mats would be woven by 8 mat-weavers in 8 days ? 1] 4 2] 8 3] 12 4] 16 Solution
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