Question

Half cubic metre of gold sheet is extended by hammering so as to cover an area of 1 hectare. The
thickness of the sheet is
(A) 0.0005 cm (B) 0.005 cm (C) 0.05 cm (D) 0.5 cm

Answer 1

Answer :

Given : Volume of gold sheet = $\frac{1}{2}$ m³ = 0.5 m³

And

After hammering area of gold sheet = 1 hectare = 10000 m²

We know Volume = Length $\times$ Width $\times$ Height = Area $\times$ Height , So

10000 $\times$ Height = 0.5

Height = 0.00005 m = 0.00005 $\times$ 100 = 0.005 cm ( We know 1 m = 100 cm )

Option ( B ) ( Ans )