Presentation on theme: "Direct And Inverse Proportion"— Presentation transcript:
1 Direct And Inverse Proportion PRACTICE TIME!Direct And Inverse Proportion
2 INVERSE PROPORTION1. 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 PROPORTION1. 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 sugar6 ounces of margarine 8 ounces of chocolate chips2 large eggs5. 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