Question : A and B can do a certain work in 6 hours, and A, B, and C together take 4 hours to do the same. How long will it take for C alone to accomplish the task?

Option 1: 12 hours

Option 2: 4 hours

Option 3: 2 hours

Option 4: 6 hours

Question : Richa, Rita and Reena can independently complete a task in 8 hours, 12 hours and 24 hours, respectively. If they work together, how much time will they take to complete that task?

Option 1: 4 hours

Option 2: 5 hours

Option 3: 2 hours

Option 4: 3 hours

Question : Working 5 hours a day, A can complete a task in 8 days, and working 6 hours a day, B can finish the same task in 10 days. Working 8 hours daily, they can jointly complete the task in _____.

Option 1: 5 days

Option 2: 3 days

Option 3: 4.5 days

Option 4: 6 days

Question : A and B can complete a task together in 18 hours. After 6 hours, A leaves. B takes 36 hours to finish the rest of the task. How many hours would it have taken A to do the task if he worked alone?

Option 1: 54

Option 2: 45

Option 3: 21

Option 4: 27

Question : P takes twice as long as Q, or three times as long as R, to complete a task. If they work together, they can complete the task in two days. How long will it take Q to complete the task on his own?

Option 1: 8 days

Option 2: 6 days

Option 3: 5 days

Option 4: 7 days