Basics of a circle of radius r = 6cm
A - area baze
A = πr² = π(6cm)² = 36πcm²
2A (upper and lower base) = 2 36πcm² = 72πcm²
lateral surface is a rectangle . Side, and the length - lof the circle and side b is the height h of the cylinder .
l = 2πr = 2π6cm = 12πcm
h = 14cm
Ar - a rectangle
Ar = lh = 12πcm 14cm = 168πcm²
Area cylindrical
2A + Ar = 72πcm² + 168πcm² = 240πcm²
V = Ah = 36πcm² * 14cm = 504πcm³