(8 min) x ( day/1,440 min) x (20 /day) x (365 da/yr) x (35 yr) =
(8 x 20 x 365 x 35) / (1,440) days =
(2,044,000) / (1,440) days =
1,419-4/9 days = 3.89 years
Rounded to the nearest year: 4 years
At a pack a day for 35years, I would have expected more than
4 years' damage. But I've checked my math and haven't found
the mistake, so I'll let that be my answer.
