Question

The volume of a block of gold is 0.8 metre cube if it is Hammer in to sheet to cover an area of 1 hectare find the thickness of the sheet

Answer 1

Volume of block gold = 0.8 m^3
1 Hectare = 10000 m^2
Let height be 'x' m
When it is beaten into a sheet of 1 hectare
0.8 = 10000 * x
0.8/10000 = x
0.00008 m = x
Height of the sheet is 0.00008 m

Answer 2

$let \: thickness \: of \: sheet \: be \: x \: m\: \\ volume \: of \: block = volume \: of \: sheet \\ 0.8 {m}^{3} = 1hectare \times x \\ 0.8 {m}^{3} = 1 \times 10000 {m}^{2} \times x \: m \\x = 0.8 {m}^{3} \div 10000 \: {m}^{2} \\ x = 0.00008m = 0.008cm = 0.08mm$