If 3.96 cubic dm of lead is to be drawn into a cylindrical wire of diameter 0.6 cm, then the length of the wire (in metres), is:
A. 130 m
B. 125 m
C. 140 m
D. 120 m
Answer: Option C
Solution (By Examveda Team)
$$\eqalign{ & 396 = \frac{{22}}{7} \times \frac{{3 \times 3}}{{10000}} \times h \cr & 140000 = h \cr & 1\,{\text{m}} \to 1000\,{\text{dm}} \cr & h = 140\,{\text{m}} \cr} $$This Question Belongs to Arithmetic Ability >> Mensuration 3D
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