Math word problems

From our database of math word problems and examples we offer:

• Flowerbed
  Ondra digs the bed in 20 minutes. Cuba in 30 minutes. For how long do they dig together?
• Length subtracting
  Express in mm: 5 3/10 cm - 2/5 mm
• Three men
  Alex is half younger than Jan, which is one-third younger than George. The sum of their ages is 48. How are these three men old?
• Two runners
  Two runners ran simultaneously towards each other from locations distant 34.6 km. The average speed of the first runner was 1/5 higher than the average speed of the second runner. How long should each ran a 34.6 km, if you know that they meet after 67 min
• The creek
  Workers cleaned the creek within 3 days. The first day cleanse one-fifth the length of the creek, the next day 40% of the length of the stream and the third day 8 km length of the creek. How long is a creek?
• Nonagon
  Calculate the area and perimeter of a regular nonagon if its radius of the inscribed circle is r = 10cm
• Find diagonal
  Find the length of the diagonal of a cuboid with length=20m width=25m height=150m
• Rotary bodies
  The rotating cone and the rotary cylinder have the same volume 180 cm³ and the same height v = 15 cm. Which of these two bodies has a larger surface area?
• Granite cube
  What is the weight in kg granite cube with an edge of 0.5 m if 1dm³ of granite weight 2600 g?
• Coal mine
  The monthly plan of 17,000 tons of coal exceeded the mine by 1/25. How many tonnes of coal have been harvested from the mine above plan?
• Ladder
  Ladder 10 meters long is staying against the wall so that its bottom edge is 6 meters away from the wall. What height reaches ladder?
• Half of halves
  Half of the square we cut off, then half of the rest, etc. Five cuts we made in this way. What part of the content of the original square is the content of the cut part?
• Square grid
  Square grid consists of a square with sides of length 1 cm. Draw in it at least three different patterns such that each had a content of 6 cm² and circumference 12 cm and that their sides is in square grid.
• Workers
  Two workers will construct the stage at the festival in 54 hours. Organizers need to shorten the assembly time by 42 hours. How many workers must the assembly company send?
• The ball
  The ball was discounted by 10 percent and then again by 30 percent. How many percent of the original price is now?
• Apples
  Mr. Vesely give to the market his own 48 kg of apples, 40 kg from Mr. Kovar and 72 kg of Mr. Novak. Grossed a total of 1,920 CZK. How must divide income money for apples?
• Is right triangle
  One angle of the triangle is 36° and the remaining two are in the ratio 3:5. Determine whether triangle is a rectangular triangle.