Question : Reena, Veena, and Vimla can do a work in 4 hours, 8 hours, and 12 hours, respectively. In how much time will they finish the work working together?

Option 1: $\frac{2}{11}$ hours

Option 2: $5\frac{2}{11}$ hours

Option 3: $3\frac{2}{11}$ hours

Option 4: $2\frac{2}{11}$ hours

Question : A can do as much work as B and C together can do, A and B can do a piece of work in 9 hours 36 minutes and C can do it in 48 hours. The time (in hours) that B needs to do the work alone, is:

Option 1: 18 hours

Option 2: 24 hours

Option 3: 30 hours

Option 4: 12 hours

Question : Tom can do a piece of work in 7 days, whereas Jay can do the same work in 14 days. How long will it take to finish the work if both work together?

Option 1: $5 \frac{2}{3}$ days

Option 2: $4 \frac{2}{3}$ days

Option 3: $7 \frac{2}{3}$ days

Option 4: $2 \frac{2}{3}$ days

Question : A can do $\frac{4}{5}$th of a work in 20 days and B can do $\frac{3}{4}$th of the same work in 15 days. They work together for 10 days. C alone completes the remaining work in 1 day. B and C together can complete $\frac{3}{4}$th of the same work in:

Option 1: 6 days

Option 2: 8 days

Option 3: 5 days

Option 4: 4 days

Question : A is twice as good a workman as B, and together they finish a piece of work in 13 days. In how many days will A alone finish the work?

Option 1: $41$

Option 2: $39$

Option 3: $19 \frac{1}{2}$

Option 4: $9 \frac{1}{4}$