1. Direct And Inverse Proportion
PRACTICE TIME!
Direct And Inverse Proportion

2. INVERSE PROPORTION
1.   If 5 men can reap a field in 20 days, in how many days will 15 men reap the field? 
2.   If 32 men can reap a field in 15 days, in how many days can 20 men reap the same field?  3.   12 men can dig a pond in 8 days. How many men can dig it in 6 days?  4.   A man pays $ men earn $ 8400 per week. What will be the earning per week of 9 men?  5.   It takes 4 men 6 hours to repair a road. How long will it take 7 men to do the job if they work at the same rate?

3. 6. A car takes 5 hours to complete a journey if it moves with a speed of 90 km/hr. How long will it take when the car travels at a speed of 75 km/hr?
7. A train moves at a speed of 110 km/hr and covers a certain distance in 9.6 hours. What should be the speed of the train to cover the same distance in 8 hours?
8. 12 men can paint the wall in 8 hours. How many men will paint the wall in 6 hours?
9. If 24 horses can graze a field in 10 days. Then how many horses will graze the same field in 15 days.
10. If 30 laborers working can finish a piece of work in 18 days, how many laborers working can finish it in 45 days? 

4. DIRECT PROPORTION
1. A labor get $980 for 14 days work. How many days should he work to get $2100?
2. A car travels 360 km in 60 liters of petrol. How much distance will it cover in 12 liters of petrol?
3. 8 potters can make 96 pots in 4 days. How many potters will be needed to make 108 pots in 4 days?
4.  There are 124 students in the hostel. Food provision for them is for 28 days. How many students are there if it lasted 16 days?

5. 9 ounces of flour 6 ounces of sugar
These are the ingredients needed for making 18 chocolate chip cookies:
9 ounces of flour 6 ounces of sugar
6 ounces of margarine 8 ounces of chocolate chips
2 large eggs
5. Justin wants to make 12 chocolate chip cookies. How much of sugar will he need?
6. Ali has 9 ounces of margarine, but plenty of all the other ingredients. What is the greatest number of chocolate chip cookies she can make?
7. Kitchen flooring is sold at $8.00 per square foot. Find the cost for 25 square feet.
(a) $200 (b) $250 (c) $320