Units - math word problems
Number of problems found: 3477
The message is spreading that each day has doubled the number of people who know about it. All know message for 20 days. How long known it eighth people?
- Rate 3
A liquid is heated at a rate of 5 degrees Celsius per minute. If the temperature now is at 39 degrees Celsius, after how long will the temperature be 94 degrees Celsius?
- Body diagonal - cube
Calculate the surface and cube volume with body diagonal 15 cm long.
- VAT on books
The cost of a book in the store is 12.5 euros. How much euros is the VAT of this book? VAT is 10%.
How many m2 of cardboard are needed to make the cuboid with dimensions 40 cm 60 cm and 20 cm?
- Area of a cube
Calculate the surface area of a cube if its volume is equal to 729 cubic meters.
Maple peak is visible from a distance 3 m from the trunk from a height of 1.8 m at angle 62°. Determine the height of the maple.
Base of building is circle with diameter 25 m. Calculate the circumference of a circular trench witch diameter is 41 cm wider than the diameter of the base.
Circle arc corresponding to angle is 32° is 28 dm long. What is the length of the entire circle?
- Surface and volume
Calculate the surface and volume of a cylinder whose height is 8 dm and the radius of the base circle is 2 dm
- Largest angle of the triangle
Calculate the largest angle of the triangle whose sides have the sizes: 2a, 3/2a, 3a
Landlord had 49 ducats more than Jurošík. How many ducats Jurošík steal landlord if the Jurošík now 5 ducats more?
Please calculate using Pascal's law. The window of the diving helmet has a surface content of about 7dm2. Calculate what pressure force acts on the window at a depth of 20 meters below the water surface.
- Water current speed.
Two cities along the river are 100 km apart. The powerboat downstream runs for 4 hours, upstream for 10 hours. Determines the river's current speed.
One pair of socks worth CZK 27. Set of 3 pairs of these socks are sold with 10% discount. How many will we pay CZK for two offered sets of socks?
Funicular on Petrin (Prague) was 408 meters long and overcomes the difference 106 meters in altitude. Calculate the angle of climb.
- Distance between two cities
Car went from A to B 4h. On the way back, the car was up 15km / h faster. The return trip took 48 minutes. Shorter than the way there. Find the distance of the cities A and B.
How heavy must prepare bread at a bakery if lose during baking 16% of water and after baking must have 2 kg? (Calculate to the nearest gram)
Calculate how much of the school year (202 days long) take Christmas holidays 19 days long. Expressed as a decimal number and as a percentage.
- Find the 6
Find the total cost of 10 computers at $ 2100 each and 7 boxes of diskettes at $12 each