A cone of height 7 cm and base radius 3 cm is carved from a rectangular block of wood 10 cm * 5 cm * 2 cm. The percentage of wood wasted is  Pick
A) 26 %
B) 28 %
C) 32 %
D) 34 %
E) None
Sol.   Volume of the block = (10 * 5 * 2)= 
<gadget id="calculator">(10 * 5 * 2)</gadget>
<output>100</output>
100 cm³   Volume of the cone carved out= [1/3 * 22/7 * 3 * 3 * 7= 
<gadget id="calculator">1/3 * 22/7 * 3 * 3 * 7</gadget>
<output>66</output>
66 cm³   ∴ Wood wasted= (100 - 66)= 
<gadget id="calculator">(100 - 66)</gadget>
<output>34</output>
34%.   Answer 34 %
<result>D</result>
A cone of height 7 cm and base radius 3 cm is carved from a rectangular block of wood 10 cm * 5 cm * 2 cm. The percentage of wood wasted is