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Question 123
A cuboid of edges 32 cm, 4 cm and 4 cm is cut to form cubes of edge 4 cm each. What is the sum of total surface areas of all cubes formed?
Solution
First we have to find the number of cubes formed
Now let cubes formed be n
Now volume of Cuboid will be equal to volume of n cubes
sow we get
$$32\times\ 4\times\ 4=n\times\ 4\times\ 4\times\ 4$$
we get n =8
Now area of cubes will be 8(6)(4)(4) =768 cm^2
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