1. What is the length of the longest rod that can be placed in a room which is 3 metres long, 4 metres broad and 5 metres high?
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By: anil on 05 May 2019 02.27 am
Length = $$l=3$$ m, Breadth = $$b=4$$ m and Height = $$h=5$$ m Length (in metres) of the longest rod that can be placed in the room is its diagonals. => Diagonal = $$d=sqrt{l^2+b^2+h^2}$$ => $$d=sqrt{(3)^2+(4)^2+(5)^2}$$ => $$d=sqrt{9+16+25}=sqrt{50}$$ => $$d=5sqrt{2}$$ m => Ans - (C)
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