Question

the radii of ends of a frustum are 14cm and 6cm respectively and its height is 6cm . find its

1)curued surface area 2)total surface area 3) volume (π=3.14)​

Answer 1

Answer:

Here, R=14cm,r=6cm,h=6cm

V=

3

1

πh(r

2

+Rr+R

2

)

=

3

1

×

7

22

×6[6

2

+(14)(6)(14)

2

]

=

7

22

×2[36+84+196]

=

7

22

×632

=1986.2cm

3