Find the volume of a cylinder with base diameter 140cm and height 10cm
2 answers:
Answer:
<h2>Volume = 153938.0 cm³</h2>Step-by-step explanation:
Volume of a cylinder = πr²h
where
r is the radius
h is the height
From the question
h = 10 cm
diameter = 140cm
We can find the radius using the formula
radius = 70 cm
Substitute the values into the above formula and solve
That's
V = (70)²(10)π
= 4900(10)π
= 49000π
= 153938.0400
We have the final answer as
<h3>Volume = 153938.0 cm³</h3>Hope this helps you
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Answer:
144°
Step-by-step explanation:
step 1
Find the measure of the central angle of the regular pentagon
Divide 360 degrees by 5 (the number of sides)
Let
c----> the center of the pentagon
we know that
m∠ECA=72°
m∠ACB=72°
therefore
m∠ECB=m∠ECA+m∠ACB
substitute the values
m∠ECB=72°+72°=144°
The measure of angle ECB is equal to the degrees that the pentagon rotate