Time & Work Problem Solving

A can do a job in 12 days, B in 8 days. Working together, how many days will they take?

• 4.5 days

• 4.8 days

• 5 days

• 5.2 days

A is 50% more efficient than B. If B can complete a task in 18 days, how many days will A take?

• 9 days

• 10 days

• 12 days

• 13.5 days

4 men complete a task in 10 days. How many men are needed to complete the same task in 5 days?

• 6

• 7

• 8

• 10

A and B work on alternate days. A can do a job in 6 days, B in 12. If A starts, in how many days is the work done?

• 6 days

• 7 days

• 8 days

• 9 days

A pipe fills a tank in 12 hours, another empties it in 20 hours. Time to fill if both are opened?

• 28 hours

• 30 hours

• 32 hours

• 34 hours

A and B can complete a task in 8 days. B alone takes 12 days. How long will A alone take?

• 16 days

• 18 days

• 24 days

• 20 days

A can do a job in 10 days, B in 15 days. They work together for 4 days. Remaining work will be done by B in?

• 4 days

• 5 days

• 6 days

• 7 days

A machine produces 100 units in 5 hrs. B is twice as fast. Both together will produce 300 units in?

• 4 hours

• 4.5 hours

• 5 hours

• 6 hours

A team of 5 people can complete a project in 8 days. How many more people are needed to finish in 5 days?

• 2

• 3

• 4

• 5

A company hires 12 workers for 15 days. In 5 days, 25% of the work is done. How many more workers to finish on time?

• 4

• 5

• 6

• 7