Question

How many seconds does an hour have?
(a) 3600
(b) 600
(c) 360
(d) 60

Answer 1

Hint:First look at the definitions of measurement and units. Categorize the given units into one type of all possible types. Use the interrelations to find the value of the given unit in terms of another. Use the newfound value in terms of the other units to get the required result asked in the question.

Complete step-by-step answer:
Measurement: Measurement is the assignment of a number to a characteristic of an object or event. The scope and application of measurements are dependent on the context and disciplines. The measurements can be compared with the other objects or events. Measurements do not apply to the nominal properties of an object or an event.
Units of Measurement: A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law that is used as a standard for measurement of the same kind of quantity. Any other quantity of that kind can be expressed as a multiple of the unit of measurement. Unit is the point used in the process of determining how large or small a physical quantity is compared to a basic reference quantity of the same kind. This basic reference is called S.I (which is the abbreviation for the International System of units).
The given condition in the question can be written as the number of seconds in an hour. This measurement comes under time in types of units. The given measurement in the question can be written as an hour = 1 hour. We know the relation given between hours and minutes, i.e, 1 hour = 60 minutes.
So, an hour can be replaced with 60 minutes. We need the value of the number of seconds in 60 minutes. We know the relation given between minutes and seconds.
1 minute = 60 seconds……(i)
Let us assume a measurement in seconds given by k. Let this value of k sec be equal to 60 minutes. So, mathematically we can write this equation as
k sec = 60 minutes
By substituting equation (i), we can write,
$$k\sec =60\times 60\sec$$
By simplifying the above equation, we can write as,
$$k\sec =3600\sec$$
$$\Rightarrow k=3600$$
So, there is 3600 sec in 60 minutes of time.
Therefore, there are 3600 seconds in an hour of time.
Therefore option (a) is the right answer.

Note: Be careful while counting. Generally, students multiply by 60 instead of dividing it and divide by 60 instead of multiplying it. So, we must remember the hour unit is greater than minutes, and the minutes unit is greater than seconds. All the interrelations are 60 times smaller.