Mailbox is opening at regular intervals 3 times a day. The first time is opened at 8:00 and the last at 19:00. Calculate hours when mailbox is opened during day.
Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):
Showing 0 comments:
Be the first to comment!
To solve this example are needed these knowledge from mathematics:
Next similar examples:
- Tram lines
Trams of five lines driven at intervals of 5,8,10,12 and 15 minutes. At 12 o'clock come out of the station at the same time. About how many hours again all meet? How many times have earch tram pass for this stop?
Seven times of my age is 8 less than the largest two-digit number. How old I am?
For three runners (on the first to third place) is prepared 30 chocolate that they be distributed in the ratio of 3 : 2 : 1 How much chocolate will get everyone?
If it takes 20 minutes to run a batch of 100 pills how many minutes would it take to run a batch of 50 pills
Michal has 2.90 per hour. How much does he earn during the week of the summer job?
The fan has a speed of 210 RPM. Calculate for time of one fan period.
- How old
The student who asked how many years he answered: "After 10 years I will be twice as old than as I was four years ago. How old is student?
1 mason casts 30.8 meters square in 8 hours. How long casts 4 masons 178 meters square?
- Bed time
Tiffany was 5 years old; her week night bedtime grew by ¼ hour each year. If, at age 18, her curfew time is 11pm, what was her bed time when she was 5 years old?
I eat 24 chocolate in 10 days. How many chocolate I eat in 15 days at the same pace?
- 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?
For 7 hours study, she scored a 75 so if she made 93 how many hours would she need to study?
The arithmetic mean of the two numbers is 71.7. One number is 5. Calculate the second number.
- Motor oil
30 liters of oil cost 28.80 Euros. How much cost a liter?
- Soccer team
Hilahs soccer team is trying to raise $2414 to travel to a tournament in Florida, so they decided to host a pancake for the breakfast. How many people need to attend their breakfast in order to raise $2414, if profit per one pancake is $1.5?
A customer purchase three (3) writing pads from a store. She receive k9.70 change from a k10.00 note . How much was it's writing pad cost?
- Report 2
A School reports students to teacher ratio of 6:1. If there are 45 teachers in the School, how many students are there?