A hollow cylindrical drum has internal diameter of 30 cm and a height of 1 m What is the maximum num...........

Quantitative Aptitude (CDS) Mensuration 3D

A hollow cylindrical drum has internal diameter of 30 cm and a height of 1 m. What is the maximum number of cylindrical boxes of diameter 10 cm and height 10 cm each that can be packed in the drum?

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Explanation:

Maximum 3 boxes can be placed at the base of the cylindrical drum along the diameter AB. So the maximum number of boxes that can be placed at the base are 7. Therefore, the maximum number of boxes that can be packed in the drum is 7×10 =70.