# Direct relationship + inverse relationship - practice problems

#### Number of problems found: 131

- The speed

The speed (v) of a moving object is inversely proportional to the time (t) traveled is written as? - Directly and inversely

If z varies directly as x and inversely as y, and z = 16 when x = 3 and y = 2, find z when x = 5 and y = 3 - Square function

If z varies jointly as x and the square of y, and z = 20 when x = 4 and y = 2, find z when x = 2 and y = 4. - Jointly function

If z varies jointly as x and y, and z = 12 and x = 2 and y = 4, find z when x = 5 and y = 2 - The cost 4

The cost to tile a floor that measures 7 x 6 square feet is $ 2,100. How much will it cost to tile a floor that measures 11 x 13 square feet? - Volleyball 2

In a volleyball game, Michael made 4 shots in 8 tries. At this rate, how many shots can he make in 12 tries? - Markus painter

Markus used ¾ liter of paint to cover 10 ½ square meters of wall. How many liters of paint is needed to cover 12 ¼ square meters of wall? - Strawberries

Three people pick strawberries from 48 rows in 8 hours. How many hours do five people need to pick strawberries from 20 rows? - The bricklayer

The bricklayer built a six-meter base of the fence in 3 hours. How long does it take to build a 14 m long base? - Cornbreads

If 4 and a half teaspoons of baking powder are need to make 10 servings of cornbread, how many teaspoons are needed to make 25 servings? - Petrol as fuel

A car can travel 480 miles on a full tank of petrol. The tank holds 60 litres. The fuel gauge shows there are 15 litres left in the tank. How many more miles can the car travel before it runs out of petrol? - Ember

Ember spent $144 on her birthday party for 18 guests. If the cost is at the same rate, how many guests will there if she spends $176? - The printer

A total of 6 piece of book covers were printed in 0.12 hours. Each piece of the book cover was printed in equal time. Calculate the time, in hours, to print 30 book covers. - Six identical

Six identical compressors inflate 180 balloons in one hour. How many balloons inflate one compressor in 10 minutes? - Mushroom risotto

630g of rice is needed to prepare mushroom risotto for four people. How many boxes of 500g rice do you have to buy to prepare risotto for 17 people? - Book reading

Susan thought, "If I read 15 pages a day, I will read the whole book in 8 days. “How many pages would she have to read a day if she wanted to finish the book on the 6th day from the start of reading? And how many pages does the book have? - Mr. Ben

Mr. Ben drives bricks to the construction site. If he drove three times a day, he would make bricks in 8 days. How many times a day would he go every day to be done 2 days earlier? - A truck 2

A truck leaves home with building materials and makes a return trip every six days. To deliver all the materials, you need eight truck trips every month. How many trucks do you need? - Olive seeds

5 kg of oil is pressed from 100 kg of seeds. How many kgs of seeds do we need to produce 85 kg of oil? - A family

A family of four consumes 220 liters of water a day. How many hectoliters of water are consumed by 68 tenants per day?

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Direct relationship - practice problems. Inverse relationship - practice problems.