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3. A man walks at the rate of 4 miles per hour. How far can he walk into the country and ride back on a trolley that travels at the rate of 20 miles per hour, if he must beback home 3 hours from the time he started? |
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Answer» A MAN walks at the rate of 4 miles per hour.How far can he walk into the country and ride BACK on a TROLLEY that travels at the rate of 20 miles per hour, if he must be back home 3 hours from the time he STARTED?:let d = the one-way distance:WRITE a time equation. time = dist/speedwalk time + ride time = 3 hrsd%2F4 + d%2F20 = 3multiply equation by 20, cancel the denominators5d + d = 606d = 60d = 10 mi he walks into the country::Check this, find the actual time walking and riding10/4 = 2.5 hrs10/20 = .5 hrs----------------tot time 3 hrs |
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