SSC CPO SI and ASI Model Paper 10

Question : 146 of 200

Marks: +1, -0

If three equal cubes are joined to make a cuboid, then what will be the ratio of the total surface area of the cube to that of the cuboid?

3 : 1
3 : 7
1 : 3
6 : 17

Validate

Solution:

(2) Let the length of each side ofthe cube be a. After joining the cubesto make the cuboid, the lengthof cuboid will be 3a while the widthand the height will remain a. So, ratioof total surface area of the cubeto that of the cuboid is,

{6a^2}/{2(3a×a+a×a+a×3a)}

={6a^2}/{2(7a^2)}=3/7

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