Time - 7th grade (12y) - math problems
Number of examples found: 357
- Obtuse angle
Which obtuse angle is creating clocks at 17:00?
- Aircraft nose down
How long will fall airliner from a height of 10000 m at speed 1,000 km/h?
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?
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
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 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
Gabrielle is 9 years younger than Mikhail. The sum of their ages is 87. What is Mikhail's age?
- Father and son
Father is 48 years old, son 23. When will be the father twice older than a son?
Seven times of my age is 8 less than the largest two-digit number. How old I am?
How long distance will travel a large (minute) hand on the clock for 48 minutes, if its length is 56 cm?
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
How many hours are in 3 2/3 days?
- Father and daughter
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
Janko is 14 years old. The age ratio of Janka and Zuzka is 2: 3. What was the ratio seven years ago?
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?
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
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
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.
What time is now, if the time elapsed after noon is 2/10 of time that elapses before midnight?
- Work together
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?
Do you want to convert time units like minutes to seconds?