What is the volume of a drum with an inner diameter of 9m and a height of 1m? How is it converted? formula

V=πR^2*H
=π*9^2*1
=81π
=254.34m^3

1m / S = how many kilometers per hour is the correct conversion process (the process has an accurate formula)

1m/s=10^(-3)km/(1/3600h)=3.6km/h

It is known that the length of an arc is 56.52 cm, and the radius of the circle where the arc is located is 27 cm. What is the central angle of the circle opposite to the arc? And formula fast

It is known that the arc length is 56.52 cm, and the radius of the circle where the arc length is located is 27 cm. How many degrees is the center angle of the circle opposite to the arc
The circumference of the circle where the arc is located is
27 * 2 * 3.14 = 169.56cm
The ratio of the arc length to the circumference of the circle
56.52/169.56=1/3
The central angle of the circle opposite this arc is
360 * 1 / 3 = 120 degrees

Given the two arc lengths of the sector, the formula for calculating the radius and center angle?

Let the two arc lengths be x and y
Then the center angle corresponding to X is: X / (x + y) * 360 '(I can't type the small circle of the angle on my mobile phone, and my score will replace it)
Radius is (if PI cannot be found during typing, P refers to PI): (x + y) / (2P)

Find the radius with known arc length and center angle

R = center angle / 180 * l

Given the radius and arc length of the sector, the formula for calculating the center angle of the circle

Arc length = pie * angle * radius / 180
Angle = arc length * 180 / (PIE * radius)

What is the volume of a drum with an inner diameter of 9m and a height of 1m? How is it converted? formula