1. A cone of height 8 m has a curved surface area 188.4 square metres. Find its volume.
2. Find the volume and curved surface area of a right circular cylinder of height 21 cm and
base radius 5 cm.
3. The surface area of a sphere is 394.24 m2
. Find its radius and volume.
7. The mean of the following data is 21.6. Find p.
Xi: 6 12 18 24 30 36
Fi : 5 4 p 6 4 6

1

Answers

2015-12-31T11:10:59+05:30
given
height 8 m
curved surface area 188.4 square metres


L = 

= π r ()

118.4 =3.14* r ()

=r* ()

60 = r * (64 + )

Squaring both the sides,

3600 = 

3600 = 64



Now lets take  = 0



(x+100)(x-36) = 0

x = -100,36

= 36 (only positive value)

Volume = 1/3 π h

=1/3 * 3.14 * 6 * 6 * 8

=301.44 




1 1 1
after giving the answer of english
hmmm
ok
plzzzzzzzzzzzz give the answer of 2 and 3 and 7 also   plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz its important plzzzzzzzzzzzzzzzzzz
okk wait