4 . R is defined to be the region bounded by the curve 2x� y�6 � 0 and the lines y � 4 , the x -axis and the y -axis
11
( a ) |
Make x the subject of 2x� y� 6 � 0
.
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( b ) |
Find the area of R . |
A conical frustum is formed by rotating the region R through 2� about the y -axis. |
[ 1 ]
[ 2 ]
( c ) Find the volume of the conical frustum . [ 2 ]
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