Question

Ans the questions with good explanation​

Answer 1

Step-by-step explanation:

Well, this is a good question!

So, total surface area is the outer surface area of any object.

For example you take any object and paint it from outside and you get the total surface area.

Since this figure is a blend of a cylinder and cone, we need the curved surface area of the cone and the TSA of the cylinder.

CSA of Cone = πrl

TSA of cylinder = 2πrh+2πr^2

Now, since the upper side of the cylinder is blocked, we ignore the surface area of upper circle of the cylinder.

So, the required TSA of cylinder becomes 2πrh+πr^2

TSA of the figure = CSA of cone+ TSA of cylinder

πrl + 2πrh+πr^2

$\bold{πr(l+2h+r)\ is\ the\ TSA\ of\ the\ figure.}$

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Answer 2

Answer:

Step-by-step explanation:

Well, this is a good question!

So, total surface area is the outer surface area of any object.

For example you take any object and paint it from outside and you get the total surface area.

Since this figure is a blend of a cylinder and cone, we need the curved surface area of the cone and the TSA of the cylinder.

CSA of Cone = πrl

TSA of cylinder = 2πrh+2πr^2

Now, since the upper side of the cylinder is blocked, we ignore the surface area of upper circle of the cylinder.

So, the required TSA of cylinder becomes 2πrh+πr^2

TSA of the figure = CSA of cone+ TSA of cylinder

πrl + 2πrh+πr^2

\bold{πr(l+2h+r)\ is\ the\ TSA\ of\ the\ figure.}πr(l+2h+r) is the TSA of the figure.

Also, ask any other query in DM.

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