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Assuming a 90 year spell includes 22 leap years, the number of days is equal to (68 x 365) + (22 x 366) = 24820 + 8052 = 32872 days. If the 90 year spell includes 23 leap years, the number of days is equal to (67 x 365) + (23 x 366) = 24455 + 8418 = 32873 days. 3 people found this useful.
Let's assume that the 50 years has 12 leap years in it, so... 50 - 12 = 38 38 years * 365 days * 24 hours = 332880 hours 12 years * 366 days * 24 hours = 105408 hours The remainder is tough, because you don't tell us which 6 months we're starting from, so I'll assume January 1 through Juen 30 in a non-leap year.ell I used the approximation of 365.25 days in a year so 50 years: 50 x 365.25 x 24 = 438300 hours 6 months: 365.25/2 = 4383 hours 2 days: 2x24 = 48 hours so total is approximately 442731 hours. Lauren Â· 8 years ago.