theshabomb theshabomb
  • 09-07-2022
  • Mathematics
contestada

Here's my work, is it right?
SA=2πr^2+2πrh
r=3.6cm
h=21.9cm
2π(3.6)^2+2π(3.6)(21.9)
=576.7964cm^2

Heres my work is it right SA2πr22πrh r36cm h219cm 2π3622π36219 5767964cm2 class=

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learner7212
learner7212 learner7212
  • 09-07-2022

Answer:

no

Step-by-step explanation:

there are somethings you need to know. The given height is the combined height of the cylinder and hemisphere. but we need to use the height of cylinder in the formula so we subtract the original height by radius.

Next thing is that the formula 2πrh is for C.S.A of the cylinder but we need the base area as well for surface area of this combined solid. So we add base area (i.e πr²) to 2πrh.

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