Work + expression of a variable from the formula - math problems

Number of problems found: 44

  • Three painters
    The three painters have painted bridge. The first would work done in 5 days, the second in 6 days, and the third in 7.5 days. How long will the bridge work if they work together?
  • Paul earned
    Paul earned 300 Kč in one hour, Václav 1/3 more than Paul. Václav worked 60 hours, which is 1/3 fewer hours than Paul worked. How many percent less earned Paul an hour than Václav? How many hours did Paul more than Václav? How much did Paul earn more than
  • Workers
    Two workers will construct the stage at the festival in 54 hours. Organizers need to shorten the assembly time by 42 hours. How many workers must the assembly company send?
  • Three pumps
    The water tank is emptied with the first pump in 6 hours, with the second pump in 2 hours. In order to be emptied in 1 hour, all three pumps had to be started at once. How long will take tank be emptied by only the third pump?
  • Wood harvesting
    The harvested wood is bundled from the forest to a sawmill. The driver makes the journey four times a day, and the work takes him 8 days. How many times would he have to go daily to get the job done 2 days earlier?
  • Twelve
    Twelve students work on a week forestry brigade. One hundred spruces will receive x CZK, one hundred pine y CZK. How many receive each one students did in one day if they planted a total of 25,000 spruces per week and 30,000 pine trees? Express by express
  • Sick
    Six seamstresses should make 60 shirts in five business days. After three days two seamstresses were sick. How many days have the remaining seamstresses to finish contract?
  • In and out
    The empty tank is filled in 12 minutes and empty in 16 minutes. How long does it take to fill if we forget to close the drain? The tank has 1000 liters of volume.
  • Two workers
    Two workers should fulfill certain task together for 5 days. If the first worker increased their performance twice and second twice fell, it took them just four days. For how many days would handle the entire task first worker himself?
  • Oil tank and pipes
    The underground oil tank can be filled by two oil pipelines. The first is filled in 72 hours and the second in 48 hours. How many hours from the moment when first pipeline began to fill the oil is it necessary to start filling it with the second to fill i
  • Trucks
    Three lorries droved bricks. One drove n bricks at once, the second m fewer bricks than the first and third 300 bricks more the first lorry. The first lorry went 4 times a day, the largest went 3 times a day, and the smallest lorry 5 times a day. How many
  • Workers
    9 workers dig a canal 120 meters long for eight hours. For how long would be dig five workers canal 200 meters long?
  • Potatoes
    Daniela and Michael would jointly dug potatoes for 7.5 hours. But if Daniela was working alone she would take 2.5 hours more as if he were working with Michael. Determine how much for the work done by Michael himself and how much Daniela herself.
  • Three children
    3 children eat 8 chocolates in 6 days. How many chocolates 6 children eat in 18 days?
  • Mean
    A student's food the mean of 50 items as 38.6. When checking the work, he found that he had taken one item as 50 to read as 40 in these circumstances correctly. What should be the correct mean?
  • Painting rooms
    If Dano paints three hours daily, he complete in 7.5 days. How many hours a day would have to work to finish the job 1.5 days earlier?
  • Cleaners
    Milan would clean up the room for 2.5 hours, Eric would take 10 hours. How long they swept the room together?
  • Blueberries 2
    Lenka and Martin collected eight liters of blueberries in two hours. How long will take to collect blueberries by Lenka itself, if we know that she collect all 2.5 hours less than Martin?
  • Contract
    8 employees complete the contract for 65 hours. After 17 hours, 3 employees had to leave for another job. How many more hours will the job on contract be fulfilled?
  • Painters
    Five painters painting the fence for eight days. How many days over will take work if paint the fence only four decorators?

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Work word problems. Expression of a variable from the formula - math problems.