Answer:
20/(9π) m/min ≈ 0.707 m/min
Step-by-step explanation:
The rate of change of height is the rate of change of volume divided by the surface area. Of course, the surface area is given by πr², where r = d/2 = 3 m.
dh/dt = (dV/dt)/A = (20 m³/min)/(π(3 m²))
dh/dt = 20/(9π) m/min ≈ 0.707 m/min
Lets say billiard balls are arranged in rows to form an equilateral triangle, then the first row consists of 1 ball, second row consists of 2 balls, and third row consists of 3 balls, and so on. So there must be
balls in the
row.
So, the total number of balls that forms the equilateral triangle with
rows is:
Let
and
be the total number of balls in the first and second arrangements respectively.
Then,
It has been said that there were 11 lesser balls in the second arrangement:
Since, 

multiplying both the sides by 2





Therefore,

So, there were 125 balls at the set.
Answer:
x=
Step-by-step explanation:
√
201 is has a square root in front of it but I could not find a way to put it into the fraction.