Tag: measuring time

Questions Related to measuring time

Write following $24$ hour times into $12$ hour times.
$3:50$

maths measuring time time in 24 hour clock time difference time

  1. $3:50$ am

  2. $3:50$ pm

  3. $3:50$

  4. $15:50$ pm

Show answer
Correct Option: A
Explanation:

For $24$ hour time from $1:00$ to $11;59$ just mark $\text{am}$ to it to convert it into $12$ hour time.

$3:50=3:50 \ \text{am}$
Option A is correct.

Convert this $12$ hour time into $24$ hour time.
$9:20$ pm

maths measuring time time in 24 hour clock time difference time

  1. $9:20$ 

  2. $11:20$ 

  3. $19:20$

  4. $21:20$

Show answer
Correct Option: D
Explanation:

To change a $pm$ time to $24$ hours time , you have to add $12 \ \ pm$ to the hours unless it is $12\ \ pm$ then the time remain unchanged .

$9:20\ \ pm=(9+12):20=21:20$ 
So option $D$ is correct.

Write following $24$ hour times into $12$ hour times.
$23:35$

maths measuring time time in 24 hour clock time difference time

  1. $11:35$

  2. $11:35$ am

  3. $11:35$ pm

  4. $23:35$ pm

Show answer
Correct Option: C
Explanation:

To convert $24$ hour time from $13:00$ to $23:59$ into $12$ hour time just subtract $12$ from the hours and mark it as $\text{pm}$.

$23:35=(23-12):35 \ \text{pm}=11:35 \ \text{pm}$
Hence, the correct answer is $11:35\text{ pm}$.

Write following $12$ hour times into $24$ hour times.
$8:53$ pm

maths measuring time time in 24 hour clock time difference time

  1. $8:53$ am

  2. $8:53$ pm

  3. $20:53$

  4. $20:53$ pm

Show answer
Correct Option: C
Explanation:

To change a $pm$ time to $24$ hours time , you have to add $12 \ \ pm$ to the hours unless it is $12\ \ pm$ then the time remain unchanged .

$8:53\ \ pm =(8+12):53=20:53$
Option $C$ is correct.

Marry put a roast in the oven at $2:45$ P.M. She cooked the roast for $3$ hours $48$ minutes. What time did Marry take the roast out of the oven?

maths measuring time time in 24 hour clock time difference time

  1. $5:36$ P.M.

  2. $6:21$ P.M.

  3. $6:33$ P.M.

  4. $7:30$ P.M.

Show answer
Correct Option: C
Explanation:

This question becomes simply the question of addition and substraction of time.
$ \therefore $ $2: 45 + 3:48$ = $6:33 $

Write following $24$ hour times into $12$ hour times.
$12:00$

maths measuring time time in 24 hour clock time difference time

  1. $12:00$ am

  2. $12:00$ pm

  3. $12:00$

  4. $0:00$

Show answer
Correct Option: B
Explanation:

For $2$ hours time from $12:00$ to $12:59$ just maark $\text{pm}$ to it to convert it into $12$ hour time.

$12:00=12:00$ pm
Hence, option B is correct.

A day has how many hours?

maths measuring time time in 24 hour clock time difference time

  1. $12$ hours

  2. $24$ hours

  3. $36$ hours

  4. $48$ hours

Show answer
Correct Option: B
Explanation:

A day has $86400s=1440mins=24hrs$

Hence, the answer is $24$ hrs.

At 4.24 pm, how many degrees has the hour hand of a clock moved from its position at noon ?

maths measuring time time in 24 hour clock time difference time

  1. $132^{\circ}$

  2. $135^{\circ}$

  3. $140^{\circ}$

  4. $145^{\circ}$

Show answer
Correct Option: A
Explanation:

The amount of degrees moved by the hour clock $=$
$=\dfrac{360}{12}(4+\dfrac{24}{60})$
$=120+12=132^\circ$

What percent of $1$ day is $36$ minutes?

maths measuring time time in 24 hour clock time difference time

  1. $25\%$

  2. $2.5\%$

  3. $3.6\%$

  4. $0.25\%$

Show answer
Correct Option: B
Explanation:
Total hours in 1 day $=  24$ hrs
$1$ hour $= 60$ minutes
Total minutes in $1$ day $=  24 \times 60 = 1440$ minutes
Percent of $36$ min in $1$ Day is 
$= \dfrac{36}{1440} \times 100  \% = 2.5 \%$

What does a.m. and p.m. means respectively?

maths measuring time time in 24 hour clock time difference time

  1. Before and after midday

  2. After and before midday

  3. Before and after midnight

  4. After and before midnight

Show answer
Correct Option: A
Explanation:
AM and PM both are Latin words, used in 12-hour clock system to represent Before Noon and After Noon. They are also represented as A.M. and P.M.
AM expand as Anti Meridiem which means "before midday" and PM expand as Post Meridiem which means "after midday".