Time - practice problems - page 3 of 144
Time (latin tempus) is one of the fundamental physical quantities of SI. The base unit is 1 second. One second is defined as 9,192,631,770 transition oscillations in the Cs-133 atom (the atomic clock ticking). Time cannot be defined using other physical quantities - it is an essential - fundamental quantity. Derived units are minute, hour, day, week, year. For example, 1 minute is defined as 60 seconds. One hour is 3600 seconds. One day is 24 hours. Fractional seconds are 1 ms (millisecond), 1 μs (microsecond), and 1 ns (nanosecond). Frequency is the inverse of the duration of a phenomenon that repeats itself.Number of problems found: 2879
- Painting a room
If 1 person can paint a room in 6 hrs, how many hours will 3 people finish painting the room? - A farmer 9
A farmer has 3 hectares of an orchard. ½ of the land is occupied by apples, ⅙ of the remainder is occupied by lemon trees, and tree tomatoes occupy the rest of it. Find the fraction of the land occupied by tree tomatoes. - Miniature train
Allen's miniature train travels at a rate of 20 meters in 2 minutes. At this rate, how far will the train travel in 10 minutes? - Temperature drop 5
The temperature outside currently is 32 degrees, dropping at an average rate of 4 degrees per hour. If the temperature continues to drop at this rate throughout the evening, what will the temperature be in 9 hours?
- Free time club
There are 60 children in a club 1/3 of them play football, 2/5 of them play cricket, and the rest play basketball. How many children play basketball - Play video game
Tyson plays video games about 2 1/2 times more than the average kid. His mother thinks that he should cut down on his playing time by 1/4 of the time. How will Tyson's gaming compare to the average kid's if he makes this change? - Write a blog
You spend 2 1/2 hours online. You spend 1/5 of that time writing a blog. How long do you spend writing that blog? - Aling
Aling Rosa can sew 8 dresses in 12 days. How many dresses can she sew in 16 days? - Working together
Zeru can complete a certain job in 5 days, and Tulu can complete the same job in 3 days. How long will they complete the job if they work together?
- Jeremy
Jeremy practiced the piano for 1 and 3/4 hours during the week. He practiced 1 and 1/3 hours less during the week than over the weekend. How long did he practice the piano over the weekend? - Washing cars
Frank takes 3 and 1/4 hours to wash six cars. How long will it take to wash 12 cars, 18 cars, and 24 cars? - The sum 43
The sum of Rs. 820 will be divided among Ali, Fakhar, and Zahid according to the ratio 3 : 4 : 5. How much does each receive? - Trigonometric fx
When an acute angle φ is in the standard position, its terminal side passes through point P (1,3). Find trigonometric functions of angle θ : sin φ, cos φ, tan φ, cotan φ. - Using 4
Using the law of cosines, find the measurement of leg b if the givens are B=20°, a=10, and c=15.
- Value of the note
A 10-month promissory note issued on March 21, 2021, bearing interest of 7.2% p.a., has a maturity value of $4128.02. Find the face value of the note. - The usage
The battery usage time installed in a particular smartphone has a Normal distribution with a mean of 25.2 hours and a standard deviation of 7.5 hours. What is the probability of usage time greater than 32? - A tree
A tree grows 1 3/4 ft per year. How long will it take the tree to grow from a height of 2 1/4 feet to a height of 37 feet? - The ratio 17
The ratio of tomatoes to red apples is 2:5. If there are 20 tomatoes, how many red apples are there? - It takes 2
It takes 7 1/5 seconds for a jet to fly 1 km. How long does it take for this jet to fly 3/4 of a km?
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