Math word problems

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

• Earth and Sun
  Earth is 150 million km away from the Sun. 300,000 km of sunlight travels in 1 second. How long will the light come from the Sun to the Earth?
• Five letters
  How many ways can five letters be arranged?
• Selling price
  Find the selling price. Cost to store: $50 Markup: 10%
• Rotary cylinder 2
  Base circumference of the rotary cylinder has same length as its height. What is the surface area of cylinder if its volume is 250 dm³?
• Unknown number 22
  I am a two-digit number. My tens digits are 4. My one digit is three more than my tens. Who am I?
• Triangular prism
  The base perpendicular triangular prism is a right triangle whose hypotenuse measures 5 cm and one cathetus 2 cm. Height of the prism is equal to 7/9 of the perimeter of the base. Calculate the surface area of prism.
• Alarm systems
  What is the probability that at least one alarm system will signal the theft of a motor vehicle when the efficiency of the first system is 90% and of the independent second system 80%?
• Sputnik
  The first Earth satellite was flying at speed 8000 m/s. At that rate he circled the earth in 82 minutes. Jet flies at an average speed 800 km/h. How long would it take circle the earth round?
• Percents
  How many percents is 900 greater than the number 750?
• Angles of a hexagon
  Find the interior angles of a hexagon if the sizes of the angles form an arithmetic sequence, and the smallest angle is 70°.
• The surface
  The cuboid's surface area is 1714 cm², the edges of the base are 25 cm and 14 cm long. Find the area of the surface.
• Triangle perimeter
  Calculate the triangle perimeter whose sides are in ratio 3: 5: 7 and the longest side is 17.5 cm long.
• Bottles
  Mrs. Violet brewed 15 l of raspberry juice. She poured it into 17 bottles. Some were 3/4 liter and some one liter. How many was bottles of this two types?
• Inflow - outflow
  The tank will fill by inflow for 143 minutes and empties by outflow for 150 minutes. How long take to fill tank if it is also opened the inflow and outflow?
• Concrete tank
  How many m³ of concrete is in the tank shape of a cuboid with dimensions of 2000 cm and 5.6 meters and 70 dm if the concrete takes up 3/7 of the tank?
• The bakery
  The bakery baked 325 cakes from 25kg flour. How many kg of flour do they need to bake 195 pieces of such cakes?
• Glass panel
  A rectangular glass panel with dimensions of 72 cm and 96 cm will cut the glazier on the largest square possible. What is the length of the side of each square? How many squares does the glazier cut?