Ratio + inverse relationship - math problems

Number of problems found: 88

  • 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?
  • 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?
  • 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?
  • Gears
    The front gear on the bike has 32 teeth and the rear, on the wheel, has 12 teeth. How many times does the bike's rear-wheel turn if you turn the right pedal 30 times? What distance will you go if the circumference of the bicycle wheel is 250 cm?
  • Coins
    The money - coins are minted from the hardest bronze, which contains copper and tin in a ratio of 41: 9. How much copper and tin are in 2kg of bronze money?
  • Coils of transformer
    The primary coil of the transformer has 400 turns, a current of 1.5 A passes through it and is connected to a voltage of 220 V. For the secondary coil, find the voltage, current, and a number of turns if the transformation ratio k = 0.1.
  • Six workers
    Six workers earned a total of CZK 12,600 per week on the construction site (5 working days). How much do 7 workers earn in 10 days with the same daily average salary?
  • Five combers
    Five combers harvest 12 rows of strawberries in 4 hours. How many rows of strawberries will two combers harvest in 10 hours?
  • Plums
    By drying 3 kg of fresh plums, we obtained 750 g of dried plums. How many kg of fresh plums need to be dried if we want to get 1.5 kg of dried plums?
  • Snack
    CZK 450 was paid for a snack for 30 pupils. How many CZK will we pay for the same snack for 28 pupils?
  • Worker's performance
    15 workers paint 180 m fence in 3 days. In how many days will 9 workers paint a 360 m fence? We assume that each worker have the same, constant and unchangeable performance.
  • The bakery
    The bakery baked 325 cakes from 25kg flour. How many kg of flour do they need to bake 195 pieces of such cakes?
  • Trio ratio
    Hans, Alena, and Thomas have a total of 740 USD. Hans and Alena split in the ratio 5: 6 and Alena and Thomas in the ratio 4: 5. How much will everyone get?
  • Painters
    Ten painters paint the school in 20 days. How many days do four painters paint the school at the same pace of work?
  • Cook on gas
    The gas cylinder will last for 30 weekends for 2 hours of daily cooking. How many days will we be able to cook on a new cylinder when we cook for 3 hours a day?
  • The work
    The work was to be done by 150 workers. At the beginning of their work, their number reduced by 40, which increased the time of work by 5 and 1/3 of the schedule. How long did work take?
  • Hay bags
    4 cows eat 16 hay bags in 5 days. How many bags will eat 5 cows in 7 days?
  • Sugar production
    From 1 ton of beet, 150 kg of sugar is produced. To clean 1 ton of sugar, 450 kg of lime is consumed. Calculate how many kgs of lime is consumed when processing 1 ton of sugar beet?
  • Chocolate
    I have a box of chocolate - white, milk and dark. The ratio of white to milk with dark is 3: 4. The ratio of white and milk to dark is 17: 4. Calculate what is the ratio between white, milk, dark chocolate.

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