vale1881
29.01.2021 •
Mathematics
Find the volume of the solid whose base is the region Ix I Iy I < 1 and whose vertical cross sections perpendicular to the y-axis are semicir- cles (with diameter along the base) g
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Ответ:
volume of the solid =
Step-by-step explanation:
As given , the region : |x| + |y| 1
when y 0 ,
|x| + y = 1
⇒|x| = 1 - y
when y ≤ 0 ,
|x| - y = 1
⇒|x| = 1 + y
The given region is the rectangle with sides (0, 5) , (0, -5), (5, 0), (-5, 0)
As given , the vertical cross section are semicircle
As we know that the area of semi circle =
Now,
Volume = +
= -
= [1-0] - [0-1]
=
⇒volume of the solid =
Ответ:
1 : 3
Find total parts :
Total parts = 1 + 3 = 4
Find 1 part :
4 parts = 1 gallon
1 part = 1/4 gallon
Find 3 parts :
1 part = 1/4 gallon
3 parts = 1/4 x 3
3 parts = 3/4 gallon
Ratio = Cleaner : Water
1 : 3
1/4 : 3/4
You will need 1/4 gallon of cleaning solution.