Question

depression at one end (see Fig. 159)
spherical
he end (see Fig. 15.9). The height of
der is 1.45 m and its radius is 30 cm. Find the
the cylinder is 1.45
tal surface area of the bird-bath. (Take
colotion : Let h be height of the cylinder, and the
common radius of the cylinder and hemisphere. Then
the total surface area of the bird-bath = CSA of cylinder + CSA of hemisphere
= 21th + 2 tr = 2r(+1)
Fig. 15,9
2x= x 300145 +30) cm
= 33000 cm
= 3.3 m
EXERCISE 15.1
Unless stated otherwise, take = =
1. 2 cubes each of volume 64 cm are joined end to end. Find the surface area of the
resulting cuboid.
2. A vessel is in the form of a hollow hemisphere mounted by a hollow cylinder. The
diameter of the hemisphere is 14 cm and the total height of the vessel is 13 cm. Find the
inner surface area of the vessel.
of meradius​

Answer 1

tex

bold

The height of

der is 1.45 m and its radius is 30 cm. Find the

the cylinder is 1.45

tal surface area of the bird-bath. (Take

colotion : Let h be height of the cylinder, and the

common radius of the cylinder and hemisphere. Then

the total surface area of the bird-bath = CSA of cylinder + CSA of hemisphere

= 21th + 2 tr = 2r(+1)

Fig. 15,9

2x= x 300145 +30) cm

= 33000 cm

= 3.3 m

EXERCISE 15.1

Unless stated otherwise, take = =

1. 2 cubes each of volume 64 cm are joined end to end. Find the surface area of the

resulting cuboid.

2. A vessel is in the form of a hollow hemisphere mounted by a hollow cylinder. The

diameter of the hemisphere is 14 cm and the total height of the vessel is 13 cm. Find the

inner surface area of the vessel.

of meradius