Number of second in 50 years?

Answer 1

There is 31,536,000 in one year and 31,622,400 in a leap year, for it to be accurate you must have a starting point.

Answer 2

There is 86,400 seconds in a day. 86,400 x 365 (days) = 31,536,000 x 50 (years)

I think you can handle it from there :)