"If a cylindrical tower `D`metres in diameter and `H`metres high is capped with a sem
Channel: Doubtnut
Date: 2020-04-05

"If a
 cylindrical tower `D`
metres in
 diameter and `H`
metres high is
 capped with a semi-spherical dome, then the total visible surface of the
 tower will be
`(piD)/2(2H+D)`
(b) `(piD)/3(H+2D)`

(c) `(piD)/2(2H+D/2)`
(d) `(piD)/3(2H+D/2)`"