Question

In the given figure triangle ABC is revolved about AC and a solid in the shape of cone is formed the volume of cone is:
height =10cm(AC)
base = 6cm(BC)
hipotunuse(slant height) = 2√34 CM.
please answer fast......

Answer 1

Answer:

Hypotenuse, AC =

3

2

+4

2

=

9+16

=

25

=5 cm

Area of ΔABC=

2

1

×AB×AC

⇒

2

1

×AC×DB=

2

1

×4×3

⇒

2

1

×5×DB=6

So, DB =

5

12

=2.4 cm

The volume of double cone = Volume of cone 1 + Volume of cone 2

=

3

1

πr

2

h

1

+

3

1

πr

2

h

2

=

3

1

πr

2

[h

1

+h

2

]=

3

1

πr

2

[DA+DC]

=

3

1

×3.14×2.4

2

×5

=30.14 cm

3

The surface area of double cone = Surface area of cone 1 + Surface area of cone 2

=πrl

1

+πrl

2

=πr[4+3]=3.14×2.4×7

=52.75 cm

2

Step-by-step explanation:

. ......

☺☺hope it's helpful for you