Question : A alone can do $\frac{1}{4}$th part of the work in 12 days. B alone can do $\frac{1}{5}$th part of the work in 4 days. In how many days can A and B together can do the same work?

Option 1: $\frac{330}{13}$ days

Option 2: $\frac{240}{17}$ days

Option 3: $\frac{210}{4}$ days

Option 4: $\frac{255}{7}$ days

Question : P, Q, and R alone can complete a piece of work in 30 hours, 10 hours and 15 hours respectively. In how much time will they finish the work if they work together?

Option 1: 5 hours

Option 2: 4 hours

Option 3: 8 hours

Option 4: 10 hours

Question : Suresh alone can do work in 10 days working 1 hour a day. Balu alone can do the same work in 2 days working 5 hours a day. How many hours do they need to work together in a day to complete the same work in 10 days?

Option 1: 1.5 hours

Option 2: 0.5 hours

Option 3: 1 hour

Option 4: 2 hours

Question : Riya alone can complete a piece of work in 6 days while Siya alone can do the same work in 9 days. If they both work together, then how many days will be required to finish the work?

Option 1: $\frac{45}{13}$

Option 2: $\frac{18}{5}$

Option 3: $\frac{33}{17}$

Option 4: $\frac{55}{16}$

Question : A₁, A₂, and A₃ alone can complete a piece of work in 12 hours, 24 hours, and 16 hours respectively. Working together, in how much time will they complete the same work?

Option 1: 5 hours 30 minutes

Option 2: 5 hours 20 minutes

Option 3: 4 hours 20 minutes

Option 4: 3 hours 30 minutes