Question

Sebuah balok berukuran panjang 12cm, lebar 9cm dan panjang diagonal ruangnya 17cm. volume balok adalah

Answer 1

Dik : p=12cm
l=9cm
diagonal ruang=17cm
dit:v?
jawab: volume : p . l . t
t?
diagonal ruang^2=t^2+diagonal bidang persegi panjang^2
diagonal persegi panjang^2=p^2+l^2
=12^2+9^2=144+81=225
=akar 225=15cm
t=akar 17^2-15^2
t= akar 289-225=akar 64=8cm
v= p.l.t
= 12.9.8
= 864cm

Answer 2

Soal : Volume :
Dik : p = 12cm; l = 9cm; Druang = 17cm;
Dit : Volume ?

Jawab : 
Diagonal bidang² = p² + l²
Diagonal bidang = √(p²+l²)
Diagonal bidang = √(144+81)
Diagonal bidang = √225
Diagonal bidang = 15 cm

Diagonal ruang² = Diagonal bidang² + tinggi²
17² = 15² + t²
t² = 17² - 15²
t = √17²-15²
t = √(289-225)
t = √64
t = 8cm

Volume = p*l*t
Volume = 12*9*8
Volume = 864 cm kubik