Question

A solid cylinder has a total surface area of 231 cm2 its curved surface area is one-third of its total surface area. Find volume.​

Answer 1

at least you should have given some value to ror h

Answer 2

Answer:

not very sure but i guess its 134.75 cm²

Step-by-step explanation:

231=2πr(r+h) is TSA

77=2πrh is CSA (given CSA is one-third of TSA)

231-77=2πr(r+h)-2πrh

154=2πr²+2πrh-2πrh

154=2πr²

r²=154÷2π

r²=154×7÷22

r²=7×7

r=7 cm

2×22÷7×r×h=77

2×22÷7×7×h=77

2×22h=77

h=77÷44=7÷4

volume=πr²h

           =(22÷7)×7×7×(7÷4)

           = 11×49÷4

           =539÷4

           =134.75 cm²