Formula for radius

Answer 1

Formula for Radius of Cylinder , closed on both ends, given its Surface Area and Height: Where : R = Radius, π = 3.1428, S = Surface Area of the Cylinder and H = Height of the Cylinder We start with formulas for the circle (Area = πR2 ) , then factor in the height (or altitude) H that forms the cylinder. Step 1: Starting Surface Area Formula: S = (2πR2 + 2πRH) Step 2: Then, rearranging the above, we get : (R+H/2) 2 = (S / 2π + H2 /4)Step 3: And , finally: R = - H /2 + √ (S / 2π + H2 /4) Example: If : S = 98, H = 14 ..Then R = 1.037