Half cubic metre of gold-sheet is extended by hammering so as to cover an area of 1 hectare. Find the thickness of the gold-sheet.
Volume of gold plate = 12m3=0.5 m3
Area covered = 1 hectare
=10000 m2
∴ Thickness of the gold = VolumeArea
=0.510000m=510000×10m
5×10010000×10cm=1200 cm