Question

The total surface area of a frustum- shaped glass tumbler is =

Answer 1

Answer:

r2 there's no option

Step-by-step explanation:

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Answer 2

The total surface area of a frustum shaped glass tumbler is $\pi \text{l(r}_1 + \text{r}_2) + \pi (\text{r}_2)^2$

Step-by-step explanation:

The correct question is

The total surface area of frustum shaped glass tumbler is (r1>r2)  

(a) πr1l+πr2l  

(b) πl(r1+r2)+π(r2)2  

(c) 13πh((r1)2+(r2)2+r1r2)

(d) h2+(r1−r2)2

$\text{Let the frustum of cone with larger radius be r}_1 \text{and smaller radius be r}_2 \ \text{respectively}$Let l be the slant height.

The total surface area of the frustum shaped tumbler = Curved Surface area of the frustum + Surface area of the bottom circle

$\text{Curved Surface area of the frustum} = \pi \text{l(r}_1 + \text{r}_2)$

$\text{Surface area of the bottom circle} = \pi (\text{r}_2)^2$

∴ The total surface area of a frustum shaped glass tumbler is ,

$\text{Total surface area} = \pi \text{l(r}_1 + \text{r}_2) + \pi (\text{r}_2)^2$

To Learn More...

1. The radii of the circular bases of a frustum of a right circular cone are 12 cm and 3 cm and the height is 12 cm. Find the total surface area and the volume of the frustum.

brainly.in/question/8911709

2. The radii of the circular ends of a frustum of a solid cone are 20 cm and 12 cm and its  height is 6 cm, then find the volume and the surface area of the frustum.

brainly.in/question/14496485