Unit conversion - 5th grade (10y) - math problems

  1. Cyclist 12
    cyclist What is the average speed of a cycle traveling at 20 km in 60 minutes in km/h?
  2. Two sides paint
    painter The door has the shape of a rectangle with dimensions of 260cm and 170cm. How many cans of paint will be needed to paint this door if one can of paint cover 2m2 of the area? We paint the doors on both sides.
  3. My father
    plot2 My father cut 78 slats on the fence. The shortest of them was 97 cm long, the longer one was 102 cm long. What was the total length of the slats in cm?
  4. The swallow
    lastovicka The swallow will fly 2.8 km per minute. How many km will the swallow fly in one hour?
  5. Aquarium
    akvarko Try to estimate the weight of the water in an aquarium 50cm long 30cm wide, when poured to a height of 25cm. Calculates the weight of the aquarium's water.
  6. Bucket
    vedro How many 5-liter buckets do you have to pour into a 0.2 m3 container to make it full?
  7. Avg speed of flight
    aircraft-02 The students vice adventure had a 2,367 km flight. If they travel time was 2 hours and 56 minutes, what was their average speed in kilometres per hour?
  8. Workers
    Clock0400_9 Three factory operators produced 480 units in 50 minutes. How many hours worked? I'm trying to prove or disapprove the idea that the company tell me that it's 2.5 hours. So what is right? Thank you, Petra
  9. One kilogram
    jablka_19 The apple weighs 125 grams and half apple. How many apples weigh 1 kilogram?
  10. The third
    meter_16 The one-third rod is blue, one-half of the rod is red, the rest of the rod is white and measures 8 cm. How long is the whole rod?
  11. Morning
    clocks2_21 Jana rose in the morning in the quarter to seven. She slept nine and a half hours. When did she go to sleep?
  12. Rectangles
    rectangles2_3 How many different rectangles with sides integers (in mm) have a circumference exactly 1000 cm?
  13. Christmas napkins
    stromcek_5 The girls embroidered Christmas napkins. Each napkin had the shape of a triangle with sides of 5 dm, 60 cm, and 800 mm. How many cms did the girls sew if they made 15 napkins?
  14. Water tank
    water_6 In an empty fire tank, 2150 hl of water jetted in 5 hours. How many hectoliters of water was jetted every hour? How many hectoliters of water was in the tank after three hours?
  15. Hr to min
    time_8 Sue biked to school in 5/12 of an hour. How many minutes did it take her to ride to school?
  16. Table
    stol_1 Find the circumference of the table, where the long side is 1.28 meters and the short side is 86 cm.
  17. Diamond
    koso_4 The diamond has a circumference of 48cm. Calculate the length of its side in dm.
  18. Hours
    clock-night-schr_2 The lesson lasts 45 minutes. For the week, students have 18 lesson hours. How many are the actual hours?
  19. Clay
    lopatka How many cubic centimeters of clay is in a pit of dimensions 4 m x 3 m x 3 m?
  20. Bean bag
    bag A student tossed a bean bag. It landed 216 inches away. How many yards are equal to 216 inches?

Do you have an interesting mathematical word problem that you can't solve it? Submit math problem, and we can try to solve it.

We will send a solution to your e-mail address. Solved examples are also published here. Please enter the e-mail correctly and check whether you don't have a full mailbox.

Please do not submit problems from current active competitions such as Mathematical Olympiad, correspondence seminars etc...