6 builders can build 10 houses. How many number of houses can 18 builders build?

6 x 30 =18 x ex

180= 18 ex

ex =180/18

number of days = 10

Step-by-step explanation:

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

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