The diameter of a circle is the distance across it, passing through the center. If the diameter is 30 cm, that means the full width of the circle from one edge to the opposite edge is 30 cm. Therefore, the diameter is simply 30 cm.
60cm
30/pi cm
d = 9.55 cm
Diameter = 30cm so radius = 15 cm. Then Area = pi*r2 = 706.9 cm2
Area = π*d2 / 4 d = 30 cm => area = 706.86 sq cm
circumference = diameter X pi pi = 3.1416 circumference = 30cm X 3.1416 = 94 cm
60cm
d = 9.55 cm
30/pi cm
d = 9.55 cm
Diameter = 30cm so radius = 15 cm. Then Area = pi*r2 = 706.9 cm2
Area = π*d2 / 4 d = 30 cm => area = 706.86 sq cm
Surface area of sphere: 4*pi*15^2 = 900*pi square cm
about 30cm about 30cm
30cm = 0.3m
Volume = 4/3*pi*153 = 14137.167 cubic cm rounded to 3 decimal places
It is 90,000 mm