Setting Up Proportions and Unit ConversionsDate: 7/25/96 at 20:36:31 From: Anonymous Subject: Setting Up Proportions and Unit Conversions If you can run 100 meters in 10 seconds, how long, in days, hours, and minutes, does it take you to run 12,800,000 meters? Date: 7/26/96 at 0:38:13 From: Doctor Paul Subject: Re: Setting Up Proportions and Unit Conversions Let's set up a proportion: 100 meters 12,800,00 meters ---------- = ---------------- 10 seconds x seconds x = 1,280,000 seconds. Now we have to convert that to days: 1 hour 1 day 1,280,000 seconds x ------------ x -------- 3600 seconds 24 hours so that's equal to 14.814 days. Let's now convert .814 days into hours: .814 day 1 day -------- = ------- x hours 24 hours so .814 day = 19.536 hours So right now we have 14 days, 19.536 hours. We need to convert .536 hours into minutes.. .536 hours 1 hour ---------- = ------- x minutes 60 minutes x = 32.16 minutes. Since your answer doesn't want seconds we round that to 32 minutes. The answer is: 14 days, 19 hours, 32 minutes. -Doctor Paul, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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