How much seconds in 20 years?

Answer 1

60 seconds in a minute, multiplied by 60 minutes = 3600

3600 seconds in an hour multiplied by 24 hours = 86400

86200 seconds in a day multiplied by 365 = 31,536,000

31,536,000 seconds in a year multiplied by 20 = 630,720,000 seconds in 20 years.