Question

Cylindrical solid has a circumference of 132cm,height is 30cm.what is the area of the solid​

Answer 1

Explanation:

Cylinder LATERAL S.A. = circ X Height = 132 cm X 30 cm = 3960 cm^2

PLUS the two ends = two X pi r^2

the circumference = pi * d = 132 cm

then diameter = 132 / pi then radius = 1/2 132 / pi = 66/ pi

so end areas : two * pi (66/ pi)^2 = 2773.1

TOTAL = 3960 + 2773.1 = 6733.1 cm^2