Examples for 8th grade - page 39

  1. Grid/network of cube
    siet_kocky Grid of cube has a circumference 42 mm. Calculate the surface area of the cube ...
  2. Three friends
    three_friends Peter is eight times older than Rado, Rado is 3 times younger than Joseph. Together they have 120 years. Determine how many are each of them.
  3. Family
  4. Aquarium 6
  5. Pages of book
  6. Colour - billboard
  7. Travel by bus
  8. Family parcels
  9. Apartments
  10. The ship
  11. Log
  12. Coal
    coal If the daily consumption of 1.6 tons of coal, it is sufficient to supply the boiler for 42 days. How long is sufficient to supply when will burn only 1.2 tons of coal a day ?
  13. Equations
  14. Freight train
  15. A three-digit numbers
    clocks_1 Determine the total number of positive three-digit numbers that contain a digit 1.
  16. Acute angles
    angles_meter Sizes of acute angles in the right-angled triangle are in the ratio 1: 6. What is size of the larger of them?
  17. Diameter
    diameter_circle If the endpoints of a diameter of a circle are A(10, -5) and B (8, 7), what is the radius of the circle?
  18. Car
    city The driver of a car is to get to 378 km distant city. From atlas found that 99 km will have to pass through the cities at average speed 48 km/h. Remainder of the journey pass outside the cities at average speed 117 km/h. Calculate how many hours it will ta
  19. Roller
    cestnyvalec Roller has a diameter of 0.97 m and a width 169 cm. How many m2 of road level when he turns 68-times?
  20. Rectangle
    golden-rectangle-ratio Calculate the length of the side FL and diagonal JL of rectangle JFLB when given: |BL| = 33 cm and angle ∠ JFB = 32 degrees.

