Bob the builder is making 480 kg concrete mix. Concrete is made by mixing cement, sand and gravel in the ratio 1:3:4 how much sa
2 answers:
Answer:
Bob the builder need 180 kg sand.
Step-by-step explanation:
The amount of concrete mixture is 480 kg. It is given that concrete is made by mixing cement, sand and gravel in the ratio 1:3:4.
Let the amount of cement, sand and gravel in concrete mixture be x, 3x, 4x respectively.
Divide both sides by 8.
The amount of sand is 3x, so
Therefore bob the builder need 180 kg sand.
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Split the triangle into a 30-60-90 triangle. Since you have LM from that triangle, you can figure out the other sides. Then, using the leg from that triangle, the one next to it is a 45-45-90 triangle, meaning it's isosceles.
KM = 30 + 10√3
KL = 10√6
(sorry i'm not too sure if my "reasons" for statement/reason is correct)
Use pythagorena theorme
D=
NOTE: x1 and x2 means the first x and second x, not x^1 and x^2
points given are
(1,1)
(5,6)
x1=1
y1=1
x2=5
y2=6
D=
D=
D=
D=
6.403
answer is B
D=
NOTE: x1 and x2 means the first x and second x, not x^1 and x^2
points given are
(1,1)
(5,6)
x1=1
y1=1
x2=5
y2=6
D=
D=
D=
D=
6.403
answer is B