Units - examples

  1. Cuboid and eq2
    kvader11_2 Calculate the volume of cuboid with square base and height 6 cm if the surface area is 48 cm2.
  2. Average speed
    bus27_4 When the bus stops at bus stops driving average speed is 45 km/h. If it did not stop it drive at speed 54 km/h. How many minutes of every hour it spend at stops?
  3. Diagonals of a rhombus
    rhombus-diagonals_1 One of the diagonals of a rhombus is twice as the other. If the sum of the lengths of the diagonals is 24, find the area of the rhombus.
  4. Pharmacy
    roztoky_3 The pharmacy add to 3 liters of 95-percent alcohol 5 liters of 38.04 percent alcohol. How many percent pharmacy got?
  5. Cube and sphere
    gule_1 Cube with the surface area 150 cm2 is described sphere. What is sphere surface?
  6. Ice and water
    ice_playground We want to cover rectangular rink with dimensions of 55 m and 25 m with 4cm thick layer of ice. How many liters of water we need if after freezing water increases its volume by 10%?
  7. Apples 2
    jablka_6 Dried apples contain 15% water. Fresh apples contain 80% water. How many kg of apples we need buy in order to get 3 kg of dried apples?
  8. Three cats
    three_cats If three cats eat three mice in three minutes, after which time 270 cats eat 270 mice?
  9. Chocolate
    cokolada Frank bought 6 same chocolates for 12 Eur. How many euros he pay for 19 chocolates?
  10. Inflation
    dollar What is better for people (employees)? ?
  11. Brick
    brick One brick is 2 kg and half a brick heavy. What is the weight of one brick?
  12. Cyclist
    cyclist_2 A cyclist passes 88 km in 4 hours. How many kilometers he pass in 8 hours?
  13. Is right?
    rtriangle Is triangle with sides 24, 51 and 45 right triangle?
  14. Holidays
    holidays Calculate how many hours take holidays, if take 1 weeks.
  15. Weeks
    calendar 55 weeks is equal to how many days?
  16. Troops
    regiment Route is long 203 km and the first day first regiment went at an average speed 20 km/h and journey back 19 km/h. The second day went second regiment same route at an average speed 18 km/h there and back. Which regiment will take route longer?
  17. Homeless Dezider
    kos Homeless Dežko has 13 coins in jacket: Calculate the value of its assets and calculate how many bottles of wine for 0.55 EUR can he buy.
  18. Ton's teeth
    teeth Calculate at what age homeless Anton will toothless. At age 40 has 27 teeth and each year next one tooth broke.
  19. It is rectangular?
    nice_3d Size of two of the angles in a triangle are: α=60°, β=20°. Is it a right triangle?
  20. Similarity
    similar_triangle Are two right triangles similar to each other if the first one has a acute angle 10° and second one has acute angle 50°?

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