# Problems for 6th grade (the sixth graders) - page 29

1. Dealer Dealer sell digital camera for € 474. Thirty percent of the price was his profit. After some time, decreased interest in selling the camera and therefore reduce its sales price by 11 %. How many percent of the new price now is dealer's profit? Round the
2. Cardboard How many m2 of cardboard are needed to make the cuboid with dimensions 40 cm 60 cm and 20 cm?
3. Hostel Students are accommodated in 22 rooms. Rooms were 4 and 6 bed. How many rooms in which type occupied 106 children there?
4. Speed of sound The average speed of sound is 330 meters per second. Estimate how long it will hear the church bell 1 km away. Calculate the distance from what would hear sound after 10 seconds.
5. Circle - easy 2 The circle has a radius 6 cm. Calculate:
6. Glass aquarium How many m2 of glass are needed to produce aquarium with bottom dimensions of 70 cm x 40 cm and 50 cm high?
7. Number Determine unknown number if you know that difference between five times and triple of number is 42.
8. Concert On a Concert were sold 150 tickets for CZK 360, 235 tickets for 240 CZK and 412 for 180 CZK. How much was the total revenues for tickets?
9. Rails 18 m railway weighs 1260 kg. How much weighs 100 m of welded railways?
10. Math classification In 3A class are 27 students. One-third got a B in math and the rest got A. How many students received a B in math?
11. Little hand What angle shifted little hand on the clock after one hour and 38 minutes?
12. The cube The surface of the cube is 150 square centimeters. Calculate: a- the content of its walls b - the length of its edges
13. Gardeners Gardeners pays to city for the lease of one square meter of land CZK 3. How much to pay each year? a) for 2 hectares b) 2 are 150 m2
14. Aquarium Aquarium is cube with edge 45 cm. How much water can fit in there?
15. Cinema 5 James wants to go to the movies every Tuesday for five years. After a year he learned that the ticket price on Wednesday is only € 5.10 and € 5.60 the other day. Now that he know about the discount, he decided to change his habits and he will go to the cin
16. Wallpaper Salesman account for 2.3 meters of wallpaper 149.50 Kc. How much cost 1 meter of wallpaper?
17. String Divide the string length 800 cm in ratio 1: 5
18. Container How many three-quarters liters jar fill 30 liters container?
19. Athlete How long length run athlete when the track is circular shape of radius 120 meters and an athlete runs five times in the circuit?
20. Pulley On wheels with a diameter of 40 cm is fixed rope with the load. Calculate how far is load lifted when the wheel turns 7 times?

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