Subject
Quantitative Aptitude
Topic
Mensuration
How many cubes each of surface area of 6 sq. dm. can be made from a metre cube?
How many cubes each of surface area of 6 sq. dm. can be made from a metre cube?
ক)
976খ)
1000গ)
841ঘ)
100ঙ)
None of theseExplanation
Given that, surface area of one cube, i.e. 6a 2 (where a is side of the cube) = 1 sq. dm., ⇒ a 2 =6/6 = 1 Then, side of the cube, a = √1 = 1 dm. Volume of the cube = a 3 ⇒ Volume = 1 cub. dm. Since 1 metre = 10 decimetre, so in 1 metre cube, there are 1000 decimetre cubes Our aim is to calculate number of cubes in 1000 cub. dm. each of 1 cub. dm. volume. Thus, number of cubes = total volume of the big cube/volume of small cubes ⇒ Number of cubes = 1000/1 = 1000 cubes.Related questions
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