Time - 7th grade (12y) - math problems

Number of examples found: 357

  • Obtuse angle
    UholZSobr2 Which obtuse angle is creating clocks at 17:00?
  • Aircraft nose down
    stall_747 How long will fall airliner from a height of 10000 m at speed 1,000 km/h?
  • Grandma
    zemiaky 6 kg of potatoes is enough for four at home for 15 days. For how many days will this amount be enough if a grandma will visit?
  • Family
    sediny Mom is 39 years old. Karl is eight years and Paul 4 years. For many years mother would old just like two children together?
  • Age question
    age Jano is three times older than Zdeno. Zdeno is 12 years younger than Janko. How old is Jano and how old is Zdeno?
  • Pumps A and B
    pump_2 Pump A fill the tank for 12 minutes, pump B for 24 minutes. How long will take to fill the tank if he is only three minutes works A and then both pumps A and B?
  • Two ages
    twodigits_1 Gabrielle is 9 years younger than Mikhail. The sum of their ages is 87. What is Mikhail's age?
  • Father and son
    family_17 Father is 48 years old, son 23. When will be the father twice older than a son?
  • Timeage
    deep Seven times of my age is 8 less than the largest two-digit number. How old I am?
  • Minute-hand
    hands How long distance will travel a large (minute) hand on the clock for 48 minutes, if its length is 56 cm?
  • Blueberries
    boruvky Marie earns 3 liters of blueberries for 3.4 hours, Peter 2.4 liters for 2.9 hours. How long have earns together one liter?
  • Hours 3
    time_9 How many hours are in 3 2/3 days?
  • Father and daughter
    family Father is 36 years old, daughter is 20 years less. What will be the ratio between them when they are 10 years more?
  • Age ratio
    calendar Janko is 14 years old. The age ratio of Janka and Zuzka is 2: 3. What was the ratio seven years ago?
  • Welders
    svarec Welder do the job for six hours, the second one for 8 hours. How long do the job third welder if all together can do job in 2 hours?
  • Ages
    calendar Father is 36 years old, his daughter is 4 years old. Write down the ratio of the age of father and daughter. In what ratio will the ages of father and daughter after 4 years?
  • Temperature increase
    teplomer_19 If the temperature at 9:am is 50 degrees. What is the temperature at 5:00pm if the temperature increases 4 degrees Fahrenheit each hour?
  • Mail train
    train_freight_3 The speed of mail train is 1370 meter per minute. Express it in miles per hour correct to three significant figure . Given that 1 meter =39.37 inches.
  • Clock
    clock2 What time is now, if the time elapsed after noon is 2/10 of time that elapses before midnight?
  • Work together
    time Two bricklayers plastering a wall. The first would plaster it in 8 hours, the second in 12 hours. How many hours will they be done with the work if they work together?

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