Time and Work Hard Level

A, B and C can finish a job in 12, 18 and 36 days. All three start together; A leaves after 3 days, and B leaves 3 days before the job is finished. How long does the job take?

A, B and C take a contract for ₹ 5,400. A and B together could finish it in 6 days, but with C's help it is finished in 4 days. How much should C get?

A can finish a job in 30 days. After 10 days his efficiency rises by 25%. How many days in all does he take?

A and B together can finish a job in 12 days, and B alone in 20 days. They work together for 4 days; after that A works at half his efficiency. How many more days do they take?

A is three times as fast as B and C together, and B is twice as fast as C. Together they finish a job in 6 days. How long would A alone take?

A and B can finish a job in 20 days, B and C in 30 days, and A and C in 24 days. All three work for 10 days, then B and C leave. How long does A take to finish?

A can finish a job in 10 days. B is 50% more efficient than A, and C is 25% less efficient than A. How long will all three take together?

A and B together can finish a job in 20 days for ₹ 6,000. They work together for 10 days, and B finishes the rest alone in 15 days. How much should A be paid?

A alone takes 8 days more than A and B together, and B alone takes 18 days more than A and B together. How long do A and B take together?

A and B together finish a job in 18 days, and with C they finish it in 12 days. If all three are paid ₹ 1,800 for the job, how much does C get?