Question

Sebuah balok berukuran panjang 12 cm lebar 9 cm sedangkan panjang diagonal ruang nya 17 cm volume balok tersebut adlah
a.552 cm
b.864 cm
c.1.620 cm
d.1.836

Answer 1

Panjang diagonal ruang = √p²+l²+t²
17 = √12²+9²+t²
√289 = √144+81+t²
√289 = √225 +t²
t = √289-225 = √64 = 8 cm
volume = p x l x t = 12 x 9 x 8 = b. 864 cm³

Answer 2

17^2 = ()^2
289  = 12^2 + 9^2 + t^2
289 =  144 + 81 + t^2
289-225 = t^2
64 = t^2 
= t
8 = t
v = p x l x t
   = 12 x 9 x 8
   = 864cm3 (B)