Question

What decimal of an hour is a second ?
A) 0.0025
B) 0.00027
C) 0.0256
D) 0.000126

Answer 1

Hint:There are 60 seconds in a minute and 60 minutes in an hour. Therefore on multiplying all the values we get the number of seconds in an hour. Hence we can divide one second by the total number of seconds in an hour to get the desired decimal value.
Complete step-by-step answer:
Total no. of seconds in a minute = 60
Total no. of minutes in an hour = 60
Therefore total no. of seconds in an hour = Total no. of seconds in a minute $ \times $Total no. of minutes in an hour
$ \Rightarrow 60 \times 60 = 3600$ seconds in an hour
Decimal value = $\dfrac{1}{{3600}} = 0.00027$
Therefore the decimal value of a second in an hour is 0.00027

Note: In such types of questions we have to remember the concept of conversion of minutes, seconds and hours and convert them into decimal values accurately to get the desired answer.