1.

the dustbin in the shape of a frustum of a cone the diameter of its circular ends are 20 cm and 40 cm if the vertical height of the dustbin is 66 cm find the capacity of the dustbin​

Answer»

Answer:

ANSWER

Given r

1

=15cm, r

2

=8cm, h=63cm

VOLUME of the dustbin (frustum)=

3

1

πh(r

1

2

+r

2

2

+r

1

r

2

)

=

3

1

×

7

22

×63(15

2

+8

2

+15×8)

=

3

1

×

7

22

×63(225+64+120)

=66×409=26,994

∴ Volume of the dustbin=26,994cm

3

.

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