How many seconds are there in seventy years?

Answer 1

70 years will include either 17 or 18 leap years, depending upon when one starts the counting.

365 days = 31,536,000 seconds

365 days by 70 = 2,207,520,000 seconds

As 1 day = 86,400 seconds then,

* If we are looking at 17 leap years, then we need to add 86,400 x 17 = 1,468,800 * If we are looking at 18 leap years, then we need to add 86,400 x 18 = 1,555,200

So, 70 years is either ...

* 2,207,520,000 + 1,468,800 = 2,208,988,800 seconds

or * 2,207,520,000 + 1,555,200 = 2,209,075,200 seconds