jossfajardo50
17.10.2019 •
Mathematics
The volume v of a rectangular pyramid varies jointly as the area of the base b and the height h. v = 56 m3, when b = 24 m2 and h = 7 m. identify b when v = 81 m3 and h = 9 m.
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Ответ:
B=27 m²
Step-by-step explanation:
Based on the information in the problem, if the volume V of a rectangular pyramid varies jointly as the area of the base B and the height h, you can write the following equation:
Where k is a constant.
You can calculate k as following:
When you solve for k you obtain:
Then, when V=81 m³ and h=9m m, B is:
Ответ:
B = 27 m² is the answer.
Step-by-step explanation:
Volume of a rectangular pyramid is = V
Area of the base is B and the height of pyramid is h.
We have to find the value of B
If V = 56 m³ then B was = 24 m²and h = 7 m
Now if V = 81 m³ and h = 9 m then from the formula of volume of a pyramid is V = 1/3(B×h) = 81 m³
81 = 1/3(B×9)
B = (81×3)/9 = 81/3 = 27 m
Ответ:
We know that 1/4 in represents 3 ft in the actual apartment.
For a mater bedroom:
L ( model ) = 1 in, W ( model ) = 3/4 in.
1 : x = 1/4 : 3
1/4 x = 3
x = 3 : 1/4 = 12 ; L = 12 ft
3/4 : y = 1/4 : 3
1/4 y = 9/4
y = 9/4 : 1/4 = 9; W = 9 ft.
Finally : Area = L x W = 12 x 9 = 108 ft²
the actual area of the master bedroom is 108 ft².