# CBSE Class 10 Answered

**Why isn't the base of the cylinder included in the TSA of the bird bath??**

Asked by subbukum | 10 Mar, 2020, 09:29: PM

Expert Answer

Total Surface area of any object refers to what you can see on the outside. If you will see here, the top of the cylinder is open (since its a bird bath) and hence, its surface area need not be taken into account whereas on the other hand, at the other end we have a hemispherical depression and hence, we don't need to account for the area of base of the cylinder, but instead need to consider only the CSA of the hemisphere.

Answered by Renu Varma | 11 Mar, 2020, 11:33: AM

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