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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 off from this bar. The cost of this cube, if 1 m3 of copper costs Rs.216 will be : |
Answer» `1m^3=l*b*h` `1m^3=l^2*h` `1/36=l^2=Area of square bar Side=1/6m. length of cube=1/6m 36m bar=216Rs. 1/6 m bar price=1/6*216/36=1 Rs. |
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