Find formula for how much longer each day is

[jja6782]

Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms longer than the day at the start of the century. In 53 centuries, what is the total (in hours) of the daily increases in time (that is, the sum of the gain on the first day, the gain on the second day, etc.)?

Dont have a clue where to start...

_James

 

[Borek]

Try to find formula for how much longer each day is, then try to calculate sum.

 

[presbyope]

Try to find formula for how much longer each day is, then try to calculate sum.

http://en.wikipedia.org/wiki/Arithmetic_progression