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lebar = 5cm
LP=2(pl+pt+lt)
258 = 2(9.5+9.t+5.t)
258 = 2(45+9t+5t)
258 = 2(45+14t)
258 = 90+28t
-28t = 90-258
-28t = -168
t = 6
volume = p.l.t
= 9.5.6
=270 cm
jawabannya b.270 cm
258 = 2(9.5 + 9t + 5t)
258 = 2(45 + 9t + 5t)
258 = 2(45 + 14t)
258 = 90 + 28t
258-90 = 28t
168 = 28t
168/28 = t
6 = t
Volume balok = p . l. t
= 9 . 5 . 6
= 270 cm
JAWABAN : b. 270 cm³