Unless otherwise posted, what is the speed limit for cars in a residential area?

In general if speed limit is not posted it will be 25 mph in residential area  

Step-by-step explanation:

When speed limit is not posted then it is 25 mph in residential area or school zones

But its also depend on the density of population in that area is density is very low then speed limit can go up to 35 mph and if density of population is high then speed limit will be restricted up to 25 mph

So in general if speed limit is not posted it will be 25 mph in residential area  

area = length x width

length = 2 x width

32 = 2 x width x width

32 = 2 x width^2

36 = width ^2  

width = 6

length = 12

area is 32

perimeter = 2 x 12 + 2 x 6 = 24 + 12 = 36

step-by-step explanation:

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step-by-step explanation: