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 : A alone can do a piece of work in 30 days. He worked at it for 5 days and then B alone finished the remaining work in 10 days. In how many days B alone can finish the entire work?

Option 1: 12 days

Option 2: 15 days

Option 3: 10 days

Option 4: 18 days

Question : A and B together can do a piece of work in 24 days. A alone can do this work in 40 days. In how many days can B alone do this work?

Option 1: 40 days

Option 2: 56 days

Option 3: 60 days

Option 4: 16 days

Question : A can do a piece of work alone in 40 days. A and B together can do the same work in 10 days. C is 50% less efficient than B. In how many days can A and C together complete the same work?

Option 1: 20 days

Option 2: 24 days

Option 3: 16 days

Option 4: 12 days

Question : Kajal can do a piece of work alone in 24 days, while Neha can do the same work alone in 40 days. Kajal started the work alone, and then after 12 clays, Neha joined her till the completion of the work. How long did the work take to be completed since Kajal started to work on it?

Option 1: $\frac{37}{4}$ days

Option 2: $\frac{39}{2}$ days

Option 3: $\frac{37}{2}$ days

Option 4: $\frac{39}{4}$ days