Sebuah balok berukuran panjang 25 cm, dan lebar 15 cm. jumlah panjang rusuknya adalah 196 cm. berapa volume dan luas permukaan balok tsb.??
5dregensleyer
Panjanng rusuk = 196 4 ( p + l + t ) = 196 4 ( 25 + 15 + t ) = 196 100 + 60 + 4t = 196 4t = 196 - 100 -60 4t = 36 t = 36/4 t = 9 volume = p x l x t = 25 x 15 x 9 = 3375 Lp = 2 ( px l + p x t + l x t) = 2 ( 25 x 15 + 25 x 9 + 15 x 9) = 2 ( 375 + 225 + 135) = 2 ( 735) = 1470
4 ( p + l + t ) = 196
4 ( 25 + 15 + t ) = 196
100 + 60 + 4t = 196
4t = 196 - 100 -60
4t = 36
t = 36/4
t = 9
volume = p x l x t
= 25 x 15 x 9
= 3375
Lp = 2 ( px l + p x t + l x t)
= 2 ( 25 x 15 + 25 x 9 + 15 x 9)
= 2 ( 375 + 225 + 135)
= 2 ( 735)
= 1470