Question : A contractor was engaged to construct a road in 16 days. After working for 12 days with 20 labourers it was found that only $\frac{5}{8}$th of the road had been constructed. To complete the work in the stipulated time the number of extra labourers required is:

Option 1: 18

Option 2: 10

Option 3: 12

Option 4: 16

Question : 30 women working 5 hours a day can complete a work in 18 days, In how many days will 21 women working 8 hours a day complete the same work?

Option 1: $18 \frac{7}{13}$ days

Option 2: $17 \frac{11}{13}$ days

Option 3: $16 \frac{1}{14}$ days

Option 4: $13 \frac{3}{14}$ days

Question : If 7 people working 4 hours a day can complete a task in 14 days. The number of days taken by 12 people working 8 hours a day will be:

Option 1: $5 \frac{1}{8}$ days

Option 2: $8$ days

Option 3: $4 \frac{1}{12}$ days

Option 4: $7 \frac{1}{4}$ days

Question : A can finish a work in 7 days. B can finish the same work in 9 days. The number of days required to finish the same work by both of them together is:

Option 1: $1\frac{15}{16}$

Option 2: $2\frac{15}{16}$

Option 3: $3\frac{15}{16}$

Option 4: $4\frac{15}{16}$

Question : If a man completed a work in 10 days and the same work was completed by a woman in 8 days. How many days will it take to complete if they work together?

Option 1: $\frac{38}{8}$

Option 2: $\frac{40}{7}$

Option 3: $\frac{40}{9}$

Option 4: $\frac{42}{9}$

Question : P, Q, and R can complete a work alone in 12,15, and 20 days respectively. They started the work together. P left the work 8 days before the work was completed and Q left the work 5 days after P had left. R completed the remaining work alone. How many days will be required to complete the whole work?

Option 1: $\frac{32}{3}$ days

Option 2: $10$ days

Option 3: $\frac{28}{3}$ days

Option 4: $\frac{25}{3}$ days