Chain Rule

40 men can dig a pond in 30 days working 5 hours/day. In how many days can 25 men finish the same pond working 8 hours/day?

• 25 days

• 30 days

• 35 days

• 37.5 days

Answer explanation

A job is done by 12 workers in 10 days working 6 hours/day. How many days will 8 workers take, working 9 hours/day?

• 10 days

• 12 days

• 15days

• 20 days

Answer explanation

If 15 men take 36 days to complete a task, how long will 9 men take to complete the same task?

• 45 days

• 54 days

• 60 days

• 72 days

Answer explanation

A certain number of workers can complete a work in 30 days. If there were 5 more workers, the work could be finished in 20 days. Find the original number of workers.

• 10

• 15

• 20

• 25

Answer explanation

8 men or 12 boys can do a work in 18 days. How many days will 4 men and 6 boys together take to complete the same work?

• 9 days

• 12 days

• 15 days

• 18 days

Answer explanation

16 men can do a work in 10 days. After 4 days, 8 more men join. In how many days will the remaining work be completed?

• 3 days

• 4 days

• 5 days

• 6 days

Answer explanation

A printing press can print 1200 pages in 10 hours using 4 machines. How many pages can 6 machines print in 5 hours?

• 900

• 1200

• 1500

• 1800

Answer explanation

If 12 machines can produce 2400 units in 10 hours, how many machines are needed to produce 4800 units in 8 hours?

• 24

• 30

• 36

• 40

Answer explanation

10 men and 5 women can complete a work in 12 days. 6 men and 9 women can complete the same work in 10 days. In how many days will 4 men and 4 women complete it?

• 18

• 20

• 24

• 30

Answer explanation

If a quarter kg of potato costs 60 paise, how many paise will 200 gm cost?

• 48 paise

• 54 paise

• 60 paise

• 72 paise

Answer explanation