Question

Total surface area of solid right circular cylinder is 231 CM square its curved surface area is 2 upon 3 of the total surface determine the radius of the base and height

Answer 1

231=2πr(r+h)

also,

2/3×231=2πrh

24.5=rh

231=2πr(r+h)

231=2πr×r+rh

r=3.5

24.5=rh

24.5/3.5=h

h=7