31.
|
A hall is 15 m long and 12 m broad. If the sum of the areas of the
floor and the ceiling is equal to the sum of the areas of four walls, the
volume of the hall is:
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32. A rectangular box measures internally 1.6 m long, I m
broad and 60 cm deep.The number of cubical blocks each of edge 20 cm that can
be packed inside the box is
A. 30 B.
53
C.
60 D. 120
33.
|
66 cubic centimetres of silver is drawn into a wire 1 mm in diameter.
The length of the wire in metres will be:
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34. Two cubes have their volumes in the ratio 1 : 27.
Find the ratio of their surface areas.
A. 11:9 B. 1:9
C.9:11 D. 9:1
35.How many cubes of 3 cm edge can be cut of a cube of 18
cm edge?
A. 36 B.
216
C. 218 D.
432
36.
|
A hollow iron pipe is 21 cm
long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm
and iron weighs 8 g/cm3, then the weight of the pipe is:
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|
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3.6kg
|
|
3.696kg
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|
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36 kg
|
|
36.9 kg
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37. Find the volume and surface area of a cuboid 16 m
long, 14 m broad and 7 m high.
A. 868 cm2 B. 789 cm2
C.141 cm2 D.598 cm2
38. A hall is 15 m long and 12 m broad. If the sum of the
areas of the floor and the ceiling is equal to the sum of the areas of four
walls, the volume of the hall is:
A. 720 B.
900
C.
1200 D. 1800
39.Tbe dimensions of an open box are 50 cm, 40 cm and 23
cm. Its thickness is 2 cm. If 1 cubic cm of metal used in the box weighs 0.5
gms, find the weight of the box.
A. 4.08kg B. 80.4kg
C. 8.04kg D.None
40.A boat having a length 3 m and breadth 2 m is floating
on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the man
is:
A. 12
kg B. 60
kg
C. 72
kg D. 96
kg
View Answer With Explanation
