Direct And Inverse Proportion

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Presentation transcript:

Direct And Inverse Proportion PRACTICE TIME! Direct And Inverse Proportion

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 $50400. 6 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?

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?

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?

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