Question

How many seconds old will someone be at the very moment they turn \[10\] years old?

Answer 1

Hint: In this question, we have to find out the required seconds from the given years.
We need to first observe the leap years in ten years. After that calculate the seconds in one year and multiply it ten times and add the leap year days to get the required result.

Formula used:
One year = \[365\] Days
One day = \[24\] Hours
One hour =\[60\] Minutes
One minutes = \[60\] Seconds

Complete Step by Step Solution:
We need to find out the seconds when someone will be at the very moment of turning \[10\] years old.
We cannot give an absolute exact answer without knowing the date and year of birth, because of the effect of leap year.
Someone who is \[10\] will have experienced \[2\] leap years for sure and perhaps \[3\] .
To find the number of seconds in a year we need to multiply one year with \[365\] days, \[24\] hours, \[60\] minutes and \[60\] seconds.
The number of seconds in one year = \[1 \times 365 \times 24 \times 60 \times 60 = 3,15,36,000\] seconds.
The number of seconds in \[10\] year = \[3,15,36,000 \times 10 = 31,53,60,000\] seconds.
The number of seconds in one day = \[24 \times 60 \times 60 = 86,400\] seconds.
Therefore if we include \[2\] leap years, the number of seconds in \[10\] year
\[ \Rightarrow 31,53,60,000 + 2 \times 86,400\] seconds
\[ \Rightarrow 31,53,60,000 + 1,72,800\] seconds
\[ \Rightarrow 31,55,32,800\] seconds
 Therefore if we include \[3\] leap years, the number of seconds in \[10\] year
=\[ \Rightarrow 31,53,60,000 + 3 \times 86,400\] seconds
\[ \Rightarrow 31,53,60,000 + 2,59,200\] seconds
\[ \Rightarrow 31,56,19,200\] seconds

Hence, the person is either \[31,55,32,800\] seconds or, \[31,56,19,200\] seconds old at the very moment when they turn \[10\] years old.

Note: Now we need to know what is second.
Second:
A second is our base unit of time—base, but not smallest. A base unit is a unit defined on its own terms upon which other units are based. That means that all our other units, such as minutes, hours, nanoseconds, and so on, are all based on seconds. We talk about hours in terms of minutes, but minutes are based on seconds, bringing us back to the base unit.