# Time - math word problems - page 145 of 146

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: 2915

- Train

The train passes part of the line for 95 minutes at a speed of 75 km/h. What speed would you have to go to shorten the driving time of 20 minutes? - Equilateral triangle

Calculate the side of an equilateral triangle if its area is 886 mm². - Triangle

Calculate the triangle's heights ABC if the triangle's sides are a=26, b=81, and c=73. - Pump

What power does a pump output to move 1060 hl of water to a height of 43 m for 8 hours?

- Fan

The fan has a speed of 179 RPM. Calculate for the time of one fan period. - A trip to the peak Dry

Calculate what percentage is rising trip from Strečno to peak Suchý (Dry peak) longer than the descent back. Team trio of tourists (Palo, Peter, and Andrew) rise took 4:21 and descent 3:08. - Thrift woman

Calculate how long grandmother will save on new shoes priced 108 euros if she saves 3 Eur monthly. - Demographics

The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase in population? - Compound interest

Calculate the time when the deposit in the bank with interest 2.6% p.a. doubles.

- Trams

Trams have an average speed of 23 km/h and run in tact 14 minutes. Pedestrian walking speed is 3.3 km/h. At what intervals do trams outrun pedestrians? - Isosceles right triangle

Calculate the area of an isosceles right triangle whose perimeter is 810 cm. - Holidays

Calculate how many hours take holidays, if it takes 5 weeks. - Bulbs

The probability that the bulb can operate 4000 hours is 0.3. What is the probability that exactly one of the eight bulbs can operate 4000 hours? - Wind drift

The plane flies at 900 km/h, passing distance 1800 kilometers with the wind and once again against the wind for 4 h 1 min. What is the wind speed?

- The cyclist

The cyclist went from village to town. The first half of the journey went at 20 km/h. The second half of the journey, which mostly fell, went at 39 km/h. All journeys took 88 minutes. Calculate the distance from the village to the town. - Radioactivity

After 548 hours decreases, the activity of a radioactive substance to 1/9 of the initial value. What is the half-life of the substance? - Collective irresponsibility

On the Internet, time is very uncomfortable for the state that no more gaffes or waste is no longer possible to hush up as if people were at home with only two television channels censored. An example of the effectiveness of the state can be Bridge at Kom - Discounts on rail (ZSSK)

The railway company ZSSK offers a discount of 15% (REGIONAL) for 5 Eur/year. Calculate the real discount rate as a percentage, where passengers will travel 19 Eur per week. - Chords

How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 tones?

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