Question : 10 men can do work in 25 days. After 12 days of work, 3 more men were engaged to finish the work. The number of days required to complete the remaining work is:
Option 1: 10
Option 2: 8
Option 3: 6
Option 4: 12
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Correct Answer: 10
Solution : Given: 10 men can do a work in 25 days. After 12 days of work, 3 more men were engaged to finish the work. Here, $M_1=10,M_2=10+3=13,D_1=25-12=13$ We know, $M_1D_1= M_2D_2$ ⇒ 10 × 13 = 13 × D2 $\therefore$ D2 = 10 days Hence, the correct answer is 10.
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Question : 12 men can complete a work in 10 days. How many more men are required to complete the work in 6 days?
Option 1: 24
Option 2: 10
Option 3: 8
Option 4: 20
Question : 4 men, working together, can finish a work in 18 days. How many more men are required to finish the same work in 12 days?
Option 1: 4
Option 2: 3
Option 3: 2
Option 4: 6
Question : 30 men can complete a work in 12 days. After 6 days, 24 more men joined them. How many days will it now take to complete the remaining work?
Option 1: $3\frac{1}{3}$ days
Option 2: $3\frac{2}{3}$ days
Option 3: $3\frac{1}{2}$ days
Option 4: $2\frac{1}{3}$ days
Question : P and Q together can complete a piece of work in 6 days. If P can alone complete the work in 18 days, the number of days required for Q to finish the work is:
Option 1: 10 days
Option 2: 8 days
Option 3: 11 days
Option 4: 9 days
Question : 4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 25 women complete it?
Option 1: 20
Option 2: 16
Option 3: 25
Option 4: 18
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