how many seconds are there in a decade?

Answer 1

As some answerers have commented, the best way to avoid the leap year problem is to use the actual value for the number of days in a year determined by the earth's orbit, not that arbitrarily assigned by a calendar. The best value to use for calendar purposes seems to be 365.2424days (see the Wikipedia article on Tropical Year for a very detailed discussion!) and so the number of seconds in a decade is 315569433.6.

Answer 2

I am not going to work it out, too lazy, but it depends on how many leap years appear in that decade. The people above have all assumed 2, but it could be 3 depending on which year your decade commences. If timed right a leap year could appear in year 1, year 5 and year 9. Or likewise, year 2, year 6 and year 10.

Answer 3

1 minute = 60 seconds
1 hour = 60 minutes
1 day = 24 hours
24*60*60 = 86400 seconds
1 year = 365 days
24*60*60*365 = 31536000 seconds
1 Decade = 10 years
24*60*60*365*10 = 315360000 seconds
So, there are 315360000 seconds in a decade..

Answer 4

60 x 60 = 3600 Seconds in An Hour.

3600 x 24 = 86400 Seconds in a Day

86400 x 365 = 31536000 Seconds in a Year

However in a decade there will be 2 leap years so it will be..

31536000 x 10 - (2*86200) = 315187600 In a Decade

Answer 5

it depends on how many leap years there are
2 leap years 315,377,280 seconds (315.4 Million)
3 leap years 315,385,920 seconds (315.4 Million)

the diference being 86400 seconds or one day

60 seconds X 60 minutes X 24 hoursX 365 days plus (60 seconds X 60 minutes X 24 hours per leap year)

Answer 6

Here are the steps in getting the actual answer for how many seconds in a decade:

Step one: How many seconds in an hour?
I know is there are 60 seconds in a minute, and 60 minutes in an hour. 60*60 is not a hard calculation to do in your head. Just multiple 6*6 and add two zeroes to the end. 6*6=36, tag on two zeroes and we're at 3600. K, so 3600 seconds in an hour.

Step two: How many seconds in a day?
From step one, we know there are 3600 seconds in an hour. 3600 * 24 = number of seconds in a day. A little harder to do in your head, but we can estimate. The trick is to multiple numbers you know. Round the numbers down to something easy to multiply, get the answer. Round the numbers up to something easy to multiply, get the answer. The real answer is in between the two numbers you came up with.

Let's try it. Do this in your head:
3000 * 20 = 60,000 (3*2=6, add 4 zeroes)
4000 * 30 = 120,000 (4*3=12, add 4 zeroes)

So, the number of seconds in a day is between 60K and 120K. Let's split the difference and estimate 90K seconds in a day.


Step three: How many seconds in a year?
From our last step, we estimated 90K seconds in a day. 90,000 * 365 = number of seconds in a year. Let's use the same estimation trick:
90,000 * 300 = 27,000,000 (9*3, add 6 zeroes)
90,000 * 400 = 36,000,000 (9*4, add 6 zeroes)

Let's split the difference and say there are 31,000,000 seconds in a year.

Step three: How many seconds in a decade?
Easy, 31 million * 10 = 310 million. We estimate there are 310 million seconds in a decade.


SO the answer 310 million seconds in a decade.

Answer 7

315360000!
It's 60 (secs) times 60 (mins) = 1 hour times 24=1 day times 365=1year times 10= 1 decade!!

Answer 8

60 seconds*60 minutes*24 hours*365 days*10 years = 315,360,000 seconds in a year.

Answer 9

315 569 260 seconds

Answer 10

Everybody seems to be assuming that there are exactly 365 days in a year, and 366 in a leap year, but it doesn't quite work that way. Better to assume that there are 365.25 days in every year, although even that's only a rough estimate.