SURFACE AREAS & VOLUMES

One cubic meter piece of copper is melted and recast into a square cross-section bar 36 m long. An exact cube is cut off from this bar. Find the cost of this cube if 1 of copper costs Rs. 108/-. 56. Find the number of coins 1.5 cm in diameter and 0.2 cm thick melted from a right circular cylinder whose height is 8 cm and diameter 6 cm. ................
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