Question

6
3. A solid is made up of a cylinder of diameter
10 cm and height 3 cm, and another bigger
cylinder of diameter 25 cm and height 2 cm.
-10 cm3 cm
2 cm
25 cm
2
1220
3
car3
ev
Find
& the volume,
(ii) the total surface area,
of the solid.
man​

Answer 1

Answer:

1st solid cylinder diameter = 60 cm, radius= 30 cm

and height =30 cm

2nd solid cylinder radius 30 cm and height 60 cm

3rd solid cylinder=height 10 cm

As per question,

Volume of 1st solid cylinder+Volume of 2nd solid cylinder= Volume of 3nd solid cylinder

V

1

+V

2

=V

3

πr

2

h+πr

2

h=πr

2

h

π(30)

2

∗30+π(30)

2

∗60=πr

2

∗10

(30)

2

∗30+(30)

2

∗60=r

2

∗10

r

2

=8100

r=90

Diameter=2r=180cm