Assignment on Surface area and Volume
1. A plastic box of 15 m long 12 m
wide and 600 cm deep is to be made . It is to be open at top . Ignoring the
thickness of plastic sheet , determine
a). The area of sheet required for
making the box.
b). The cost of sheet for it , if a
sheet measuring 1 m^2 costs Rs 10 .
2. A plastic box of 10 m long 10 m
wide and 650 cm deep is to be made . It is to be open at top . Ignoring the
thickness of plastic sheet , determine
a). The area of sheet required for
making the box.
b). The cost of sheet for it , if a
sheet measuring 1 m^2 costs Rs 15 .
3. The length, breath and height of
a room are 4000 cm, 3000 cm and 3000 cm respectively . Find the cost of white
washing the walls of the room and the ceiling at the rate of 10 Rs
per m^2 .
4. The length, breath and height of
a room are 2000 cm, 1500 cm and 1500 cm respectively . Find the cost of white
washing the walls of the room and the ceiling at the rate of 10 Rs
per m^2 .
5. The floor of
a rectangular hall has a perimeter 200 m . If the cost of painting the four
walls at the rate of 10 Rs per m^2 is 10000 , find the height of the hall . [
Hint :- Area of the four walls = Lateral surface area ]
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| maths-ncert-soltutions |
6. The floor of
a rectangular hall has a perimeter 100 m . If the cost of painting the four walls
at the rate of 10 Rs per m^2 is 5000 , find the height of the hall . [ Hint :-
Area of the four walls = Lateral surface area ]
7. The floor of
a rectangular hall has a perimeter 150 m . If the cost of painting the four
walls at the rate of 10 Rs per m^2 is 8000 , find the height of the hall . [
Hint :- Area of the four walls = Lateral surface area ]
8. The paint in a certain container is
sufficient to paint an area equal to 8.88 m^2 . How many bricks of dimensions
20 cm * 10 cm * 7 cm can be painted out of this container ?
9. The paint in
a certain container is sufficient to paint an area equal to 7 m^2 . How many
bricks of dimensions 18 cm * 10 cm * 5 cm can be painted out of this container
?
10. The paint
in a certain container is sufficient to paint an area equal to 5 m^2 . How many
bricks of dimensions 12 cm * 10 cm * 4 cm can be painted out of this container
?
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