Question 142
Area of the floor of a cubical room is 48 sq.m. The length of the longest rod that can be kept in that room is
Solution
as all the sides of cube are equal . and area of floor of a cube = $$(side)^2$$
so side of cube = $$\sqrt(48)$$ = 4$$\sqrt(3)$$
longest rod length possible is along diagonal of cube = $$\sqrt(3)$$ x side = 12 m
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