# Inverse proportion - practice problems

Inverse relationship, also called Inverse proportion occurs when one value increases and the other decreases. For example, more workers on a job would reduce the time to complete the task. They are inversely proportional. Two sequences of numbers are inversely proportional if corresponding elements have a constant product, also called the coefficient of proportionality.#### Number of problems found: 369

- A piece of work

12 men or 18 women can do a piece of work in 14 days, then how long 8 men and 16 women take to finish the work? - Three workers

A can do a work in 16 hours, and B alone in 24 hours. If A, B, and C work together and finish it in 8 hours, then C alone can finish it in how many hours? - Proportional relationship 3

Which table below shows a proportional relationship? A. x ; y 3; 12 4; 16 5; 20 6; 24 7; 28 B. x ; y 3; 15 4; 20 5; 25 6; 35 7; 40 C. x ; y 3; 24 4; 32 5; 45 6; 48 7; 56 D. x ; y 3 ; 21 4; 24 5; 35 6; 42 7; 49 - The capacitor

The parallel square plates of a 4.5µF Teflon capacitor are 3.2 mm apart. What is the area of the plate?

- Wheat flour

If the cost of 1 kg of wheat flour is Tk 41 1/2, find the cost of 3 1/4 kg of wheat flour. - Glue strength

At 40°C, it takes 3 hrs to get 125% glue strength. How long does it take to get 100% at 50 ˚C? The higher the temperature, the faster it cures the glue. - Bags

If six bags of flour have a mass of 27 kilograms, what will be the mass of 11 bags? - Conductive 83502

A conductive soap bubble with a radius of r=2 cm and charged to a potential of φ= 10000 V will burst into a drop of water with a radius of r1= 0.05 cm. What is the potential φ1 of the drop? - Families 83209

Coal for 15 families lasts 60 days. How many days will the coal last for 20 families?

- Proportional 83174

For the lever to be balanced, the arms' lengths must be inversely proportional to the weight ratio of the weights suspended on these arms. Complete the data: 30 cm, 10 cm, 4 kg, and? kg. - Costs 82804

3 kg of meat costs €8.10. How many kg of meat can we buy for €27? - Workers 82802

Five workers do a job in 20 hours. How long will it take two workers to do the same job? - Railings 82711

Seven part-timers paint 280 m of railings in 5 hours. How many meters of railing will nine part-timers paint in 4 hours? - Efficient 82615

Six maids in a hotel make 200 beds in 2 hours. Calculate how long five equally efficient maids would take to make these beds. Enter the result in minutes. Calculate how long three equally efficient maids would take to make 100 identical beds. Express the

- Harvested 82548

Farmers harvested 1110q of grain from 37 hectares of wheat. a) how many q of wheat did they harvest from 12 hectares? b) how many grains were harvested from 1 m². C) how big is the side of the square of the field from which they harvested 1q of wheat? - Construction 82214

At the construction site, the sand that belongs to the mortar is sifted through a sieve. At the same time, 1/6 of the coarse sand falls through. Determine how many m³ of sand must be brought in to obtain 2 m³ of sifted sand. - 45-minute 82169

I have 38 lessons that last 70 minutes. How many teaching hours are there in terms of 45-minute lessons? - Throughout 82075

In the metro, trains run in one direction at the same speed and the same intervals. Yesterday, there were 24 trains throughout the day. More trains will run today, as the time interval between trains will be shorter by 20%. How many more trains will there - Afforestation 81997

During afforestation, two workers planted 80 seedlings in 2 hours. At the same output, how many seedlings did 6 workers plant in 5 hours?

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