One cubic meter piece of copper is melted and recast into a bar 36 meters long with a square cross-sectional area. An exact cube is cut is off from this bar. The cost of this cube. if 1m of copper costs Rs.216 will be:

Explanation

`V_i=1m^3`

`V_p=1m^3`

`l*b*h=1m^3`

`l^2*h=1m^3`

`l^2=1/36`area of square bar.

`side=1/6m`

length of cube=1/6m

36 m bar =216 Rs.

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