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The figure shown represents a plot of land and is drawn using a scale in which 1 cm equals 2 miles. One square mile is 640 acres. How large is the actual plot of land, in acres?

 

 Apr 19, 2021
 #1
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Area =   (12+10) /2  X  10 = 110 cm^2

 

each cm^2 = 4 mi^2            110cm^2 * 4 mi2/cm2     * 640 acres/mi2  =281600 acres     (edited)

 Apr 19, 2021
edited by ElectricPavlov  Apr 19, 2021
 #2
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We can convert the 10, 10, and 12 cm's to 2 miles, so that it is

$20, 20, 24$, we can find the area with $(a+b)/2*h$

$(20+24)/2*20=440$

that is 440 square miles, then we multiply by 640

 

our answer is $440*640$

too lazy to use calculator lol

 Apr 19, 2021

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