# 15 years is how many seconds?

Sep 6, 2016

Assumption: This is not a leap year

$31536000$

$\text{which is the same as } 3.1536 \times {10}^{7}$

#### Explanation:

Number of days in a year are 365

Number of hours in a day is 24
So the number of hours in a years is $24 \times 365 \text{ ""hours"/"year}$

Number of minutes in an hour is 60
So the number of minutes in a year is $60 \times 24 \times 356 \text{ ""minutes"/"year}$

The number of seconds in a minute is 60
So the number of seconds in a year is:

$60 \times 60 \times 24 \times 356 \text{ ""seconds"/"year}$

$31536000$

$\to 3.1536 \times {10}^{7}$