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Byju's Answer
Standard VIII
Mathematics
Faces, Edges and Vertices
Identify the ...
Question
Identify the solid that cannot be packed without gaps using unit cubes.
A
Cone
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B
None of the above
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C
Rectangular prism
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D
A cube of side length 5 units
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Solution
The correct option is
A
Cone
A rectangular prism can be packed without gaps using unit cubes.
A cube of side length 5 units can be packed without gaps using 125 unit cubes.
A cone cannot be packed without gaps using unit cubes as it has a curved surface.
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Q.
Ganesh and Dinga want to pack 4000 centimetre cubes in boxes. These are to be sent to a school. There are three different boxes available for packing.
• What is your guess? Who is right?
• How can Ganesh and Dinga test their guesses before packing the cubes in the boxes? Discuss with your friend.
Use Ganesh's method and write:
• _________ centimetre cubes can be arranged in box B.
• _________ centimetre cubes can be arranged in box C.
• So _________ centimetre cubes in all can be packed in the three boxes.