How long will it take him to plow 21 acres, Mathematics

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Mr. Brown plowed 6 acres in 1 hour. At this rate, how long will it take him to plow 21 acres?

Mr. Brown plows 6 acres an hour, so divide the number of acres (21) through 6 to find out the number of hours required; 21 ÷ 6 = 3.5 hours.


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