Question

th
C
30 cm
"50
so
CA
50 cm
60 cm
(b)
di
8
1 m
2 m
VC
7 cm
EXERCISE 11.3
1. There are two cuboidal boxes as
shown in the adjoining figure. Which
box requires the lesser amount of
material to make?
2 A suitcase with measures 80 cm x
40 cm
48 cm x 24 cm is to be covered with
a tarpaulin cloth. How many metres of tarpaulin of width 96 cm is required to det
(a)
100 such suitcases?
3. Find the side of a cube whose surface area is
600 cm?
o
4. Rukhsar painted the outside of the cabinet of
measure 1 mx 2 m x 1.5 m. How much
surface area did she cover if she painted all except the bottom of the cabinet.
5. D. el is painting the walls and ceiling of a
Jal hall with length, breadth and height
of 3 m, 10 m and 7 m respectively. From
each can of paint 100 m² of area is painted.
How
many cans of paint will she need to paint 7 cm
the room?
Describe how the two figures at the right are alike and how they are different. Which
box has larger lateral surface area?
7. A closed cylindrical tank of radius 7 m and height 3 mis
made from a sheet of metal. How much sheet of metal is
required?
8. The lateral surface area of a hollow cylinder is 4224 cm?.
It is cut along its height and formed a rectangular sheet
of width 33 cm. Find the perimeter of rectangular sheet?
A road roller takes 750 complete revolutions to move
once over to level a road. Find the area of the road if the
diameter of a road roller is 84 cm and length is 1 m.
A company packages its milk powder in cylindrical
POWDERED 28
container whose base has a diameter of 14 cm and height MILK
20 cm. Company places a label around the surface of
Po
the container (as shown in the figure). If the label is placed
14 cm
2 cm from top and bottom, what is the area of the label.
7 cm
I
Y
0
36.​

Answer 1

your answer is 5cm 4 apon geimdyr8wox e jwodkf 48w9ofn4beuf48w9ofn4beufupenfnehw9odnrhe83o