samiyahbass
27.07.2019 •
Mathematics
The volume of a cone varies jointly with the area of the base and the height. when the area of the base is and the height is the volume is therefore the area base is blank when the height is 12cm and the volume is 124cm
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Ответ:
where
V = volume
k = constant of proportionality
A = area of the base
h = height of the cone
The given info is for A = 27, and h = 6, then V = 54 (all using appropriate units for area, length, and volume, respectively.)
Now we can find k, the constant of proportionality.
V = kAh
54 = k * 27 * 6
k = 54/(27 * 6)
k = 1/3
The formula is
Now we use the second set of info, the height and the volume, and we find the area of the base.
the area of the base is 31 cm^2
Ответ: