6- The dimension of a solid rectangular at given instant ( to ) are (L = 13 cm) ,(W = 9 cm ) and ( H = 5 cm ). If (L) and ( H) are increasing at ( 2 cm/sec) and ( W) decreasing at ( 4 cm/sec ) %3D Find the rate of change of volume ( V) and surface aera ( S ) at time ( to ) ? Are ( V) and ( S) increasing, decreasing or neither ?

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