ठोसों के संयोजन का पृष्ठीय क्षेत्रफल
Let us consider the container shown in Fig. 1. How do we find the surface area of such a solid?This solid is made up of a cylinder with two hemispheres stuck at either end.
Total Surface Area (TSA) of new solid = Curved Surface Area (CSA) of one hemisphere +
Curved Surface Area (CSA) of cylinder + Curved Surface Area (CSA) of other hemisphere
Curved Surface Area (CSA) of hemisphere =
Curved Surface Area (CSA) of cylinder =
Example
1.A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, If the height of the cylinder is 10 cm, and its base is of radius 3.5 cm,
find the total surface area of the article.
Solution:
Here
Total Surface Area (TSA) of wooden article = Curved Surface Area (CSA) of cylinder + 2 X Curved Surface Area (CSA) of hemisphere
cm2
The total surface area of the article is cm2