(14) .
(15) ; is max. for , min. for .
(1) ; .
(2) ;
- ;
- .
(3) ; .
(4) .
(5) ,
- ,
- .
(7) Minimum for .
(8) (a) Length feet, width = depth = foot, vol. = cubic feet.
- (b) Radius = feet = in., length = feet, vol. = .
(9) All three parts equal; the product is maximum.
(10) Minimum for .
(11) Min.: and .
(12) Angle at apex ; equal sides = length =.
(1) .
(2) .
(3) .
(4) (a) ;
- (b) .
(5) .