Time units

🏆Practice time units

Time units serve the function of quantifying time and have been created in order to organize it productively.
They are like a universal language that allows us to measure time.

Units of time and conversion that are important to know:

In one minute there are $60$ seconds.

In an hour there are $60$ minutes.

In a day there are $24$ hours.

Test yourself on time units !

$$7min=?hr$$

Example of an exercise with time units

How many minutes are there in $8$ hours?

If there are $60$ minutes in an hour, we must multiply the number of hours by $60$ to obtain the equivalent number of minutes.

$8\cdot60=480$

That is, $8$ hours equals$480$ minutes.

Another exercise with time units

How many minutes are $90$ seconds?

In one minute there are $60$ seconds, so we must divide the number of seconds by $60$ to get the number of minutes.

Attention! Unlike the previous exercise, here we must divide by $60$ instead of multiplying.
The data we were given is the number of seconds and we have to find out the minutes.

$1$ minute $=~60$ seconds

$X$ minutes $=~90$ seconds

$x=\frac{90}{60}=\frac{9}{6}=\frac{3}{2}=1.5$

That is, $90$ seconds equals $1.5$ minutes.

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Ejemplos y ejercicios con soluciones de unidades de tiempo

Exercise #1

$7min=?hr$

Video Solution

$\frac{7}{60}$

Exercise #2

$2hr=?sec$

Video Solution

$7200$

Exercise #3

$3hr=?min$

Video Solution

$180$

Exercise #4

$60min=?hr$

Video Solution

$1$

Exercise #5

$15min=?hr$

Video Solution

$\frac{1}{4}$

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Review questions

What are the units of time?

In the case of time, the most common units are measured with a clock and these are seconds (unit in the International System), minutes and hours, although we can also measure it in days, weeks, months, years, centuries, etc.

How do you calculate the seconds in a day?

We know that in a day there are $24$ hours, in an hour there are $60$ minutes and in each minute there are $60$ seconds, so in order to calculate how many seconds there are in a day we would only have to do a multiplication.

First let's see how many seconds there are in an hour. To multiply

$1$ hour

$60\times60=3600$

In an hour there are $3600$ seconds, so now let's multiply by $24$ hours in a day.

$1$ day

$3600\times24=86400$

Therefore in a day there are $86400$ seconds.

How to convert time units?

In order to see how to do time conversions let's look at the following examples, where we will need some time equivalences.

Example 1

Task. Convert $6$ minutes to seconds

Solution

We already know that one minute has $60$ seconds, so let's do a multiplication

$6\times60=360$

Result

$6$ minutes is equal to $360$ seconds.

Example 2

Task. Convert $120$ hours to days.

Solution

A day has $24$ hours so in this case a division will be made.

$\frac{120}{24}=5$

Result

$120$ days equals $5$ days

Do you know what the answer is?