A cylinder with a bottom radius of 3 decimeters, its side area is 94.2 square decimeters, find its volume

A cylinder with a bottom radius of 3 decimeters, its side area is 94.2 square decimeters, find its volume

high
=Side area / perimeter of bottom surface
=94.2÷（2×3.14×3）
=5 decimeters
volume
=Bottom area × height
=3.14×3²×5
=141.3 cubic decimeter

What is the formula for calculating the circumference of a cylinder by the area and height of its bottom?
The original question is:
S = 314m, H = 9m
C=
V=

Perimeter = (bottom area △ 3.14) square root * 2
314÷3.14=100
R = 10 (m)
C = 3.14 * 10 * 2 = 62.8 (m)
V = 314 * 9 = 2826 (M3)

Formula of cylinder surface area (expressed in letters)

Side area of cylinder = perimeter of bottom surface × height (perimeter of bottom surface, you know, perimeter of circle (2 π R) or (π d))
Surface area of cylinder = 2 bottom areas + 1 side area (bottom area, you know, area of circle (π R × R) or (π (D / 2) × (D / 2) (don't forget to add × 2, because there are 2 bottom areas!)
Volume of cylinder = bottom area × height (SH)
Base area of cylinder = area of circle (π R × R) or (π (D △ 2) × (D △ 2))

A letter formula for calculating the surface area of a cylinder
Urgent~

S table = s bottom × 2 + C bottom × H
＝πr^2*2+2πrh
S side = C bottom × H = 2 π RH
Surface area 2R π (R + H)