Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
secondary 4 | A Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
Hi for this qn right how u know whicch part is closed?
Date Posted: 1 year ago
Views: 273
because they said solid i think its safe to assume whole thing is closed
See 1 Answer
When they state "solid", you can assume that the entire object is enclosed, unless stated otherwise in a question.
Total Surface Area (SA) in this case is thus as such,
Total SA = Exposed SA for hemisphere + Exposed SA for cylinder
Total SA = 3π(3r)^2 - π(r)^2 + πr(2r) + π(r)^2
Total SA = 29π(r)^2
Total Surface Area (SA) in this case is thus as such,
Total SA = Exposed SA for hemisphere + Exposed SA for cylinder
Total SA = 3π(3r)^2 - π(r)^2 + πr(2r) + π(r)^2
Total SA = 29π(r)^2
360 Tutoring Program