1. Sum of lengths of all edges of a cube is 84 cm, find its volume?
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By: anil on 05 May 2019 02.15 am
Let the edge of the cube = $$a$$ cm Number of edges in a cube = 12 Sum of all the edges = $$12a = 84$$ => $$a = frac{84}{12}=7$$ $$ herefore$$ Volume of cube = $$a^3$$ = $$(7)^3=343$$ $$cm^3$$ => Ans - (B)
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