Answer: h = 12mm
Step-by-step explanation:
The volume of a pyramid is given as :
V =
lwh
Therefore:
324 =
lwh
324 x 3 = 9 x 9 x h
Therefore:
h = 972/81
h = 12mm
Answer:
41.65
Step-by-step explanation:
First do 5.5*20.7 because of PEMDAS or GERMDAS which is basically saying the order of how to solve expressions/equations
5.5*20.7=113.85
Then subtract 113.85 from 155.5
155.5-113.85=41.65
Answer:
Since,
Length is 4 times Breadth
Let Breadth be x
Therefore,Length=4x
Perimeter=50m
Therefore,
50m=2(l+b)
50m=2(4x+x)
50m=2(5x)
50m=10x
x=5m.
Therefore,
Breadth=5m
Length=4x=4×5=20m
Answer:
In the first equation, it's H20 but the second is B
2Mg + 2O2
Answer:
x =
, y = 6
Step-by-step explanation:
5x + y = 7 → (1)
20x + 2 = y → (2)
Substitute y = 20x + 2 into (1)
5x + 20x + 2 = 7
25x + 2 = 7 ( subtract 2 from both sides )
25x = 5 ( divide both sides by 25 )
x =
= 
Substitute this value into (2) and evaluate
20(
) + 2 = y
4 + 2 = y , so
y = 6