tolang dong yng nomer 22,23,24,25 besok di kumpulin pakek cara y

22 ] Luas permukaan

= 2 × [ 21 cm × 14 cm ] + [ 21 cm × 12 cm ] + [ 14 cm × 12 cm ]

= 2 × 294 cn + 252 cm + 168 cm

= 2 × 714 cm

= 1.428 cm2

23 ] Luas kertas

= 2 × π × r × [ r + t ]

= 2 × 22/7 × 7 cm × [ 7 cm + 18 cm ]

= 1.100 cm2

24 ] Volume

= π × r × r × t

= 22/7 × 10,5 cm × 10,5 cm × 40 cm

= 13.860 cm3

= 13,860 liter

25 ] Volume

= 92 cm × 58 cm × 42 cm

= 224.112 cm3