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In the following table information about a few cylinders are given, copy and complete the table.

Radius(cm)
Height(cm)
Curved surface
Area of base
Total surface
7
9
[[1]]
[[2]]
[[3]]

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Detailed Solution

We have given the radius of the cylinders which are 7, 14, and 21 in cm and height of cylinder are 9, 10, and 5 in cm.
First, we will solve for the cylinder having radius 7 cm and height 9cm.
Curved surface area of this cylinder

= 2 π r h

Curved surface area of this cylinder

= 2 × π × 7 × 9

Curved surface area of this cylinder

= 396 c m 2

.
Now, we will find the area of the base of the cylinder which is equal to

π r 2

.
Surface area of base of cylinder

= π (7) 2

Surface area of base of cylinder

= 154 c m 2

Now we will find the total surface area which is equal to

2 π r r + h

.
Total surface area

= 2 π × 7 7 + 9

Total surface area

= 2 × 3.14 × 716

Total surface area

= 704 c m 2

So, the total surface area of the cylinder having radius 7 cm and height 9cm is

= 704 c m 2

Radius(cm)	Height(cm)	Curved surface(in $cm 2$ )	Area of base(in $cm 2$ )	Total surface(in $cm 2$ )
7	9	396	154	704

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