SOLUTION: there are about 1 billion people in china .if they lined up four to a row and marched past you at the rate of 25 rows per minute .how long would it take the parade to pass you ?.

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Question 1153774: there are about 1 billion people in china .if they lined up four to a row and marched past you at the rate of 25 rows per minute .how long would it take the parade to pass you ?.
Found 2 solutions by ikleyn, greenestamps:
Answer by ikleyn(52788) About Me  (Show Source):
Answer by greenestamps(13200) About Me  (Show Source):
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4 people per row, times 25 rows per minute, equals 100 people per minute.

Time required for 1,000,000,000 people to pass by:

(1 billion) divided by 100 = 10 million minutes = a bit over 19 years.