SSC CHSL 15 Nov 2015 Shift 2 Paper

Question : 102 of 200

Marks: +1, -0

The volume of a right circular cone which is obtained from a wooden cube of edge 4.2 dm wasting minimum amount of wood is:

Solution:

Height of largest circular cone = 4.2 dm and radius =

4.2/2=2.1

dm
Volume of cone =

1/3πr^2h

1/3 ×22/ 7 × (2.1) ^2 × 4.2

22 × 4.41 × 0.2 = 19.404 \dm^3

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