Inverse Proportion

3 workers build a wall in 12 hours. How long would it have taken for 6 equally productive workers?

• 6

• 12

• 36

• 48

It takes 14 hours for a faucet with a flow of 18 liters per minute to fill a reservoir with water. How long will it take if its flow is reduced to 7 liters per minute?

• 32

• 14

• 36

• 24

If 35 men can reap a field in 8 days; in how many days can 20 men reap the same field?

• 35

• 7

• 28

• 14

8 cows can graze a field in 28 days. How long would 4 cows take to graze the same field?

• 48

• 56

• 36

• 40

If 32 men can reap a field in 15 days, in how many days can 20 men reap the same field?

• 24

• 32

• 48

• 36

12 men can dig a pond in 8 days. How many men can dig it in 6 days?

• 20

• 15

• 16

• 24

It takes 4 people 2 days to paint a wall. How long would it take if we got8 people to do it?

• 1

• 4

• 8

• 6

7 men can complete a work in 52 days. In how many days will 13 men finish the same work ?

• 36

• 28

• 42

• 56

A book contains 120 pages and each page has 35 lines . How many pages will the book contain if every page has 24 lines per page ?

• 185

• 125

• 175

• 150

David can complete a work in 6 days working 8 hours per day. If he works 3 hours per day, how many days will he take to complete the work ?

• 12

• 32

• 24

• 16