Question

Bagaimana cara menjawabnya?

Answer 1

18. 2880=30.3x.2x
      288=  3.3x.2x
       96=6x^2
     x^2=96/6= 16
x= √16=  4 cm
P= 3.4 =12 cm
l = 2.4 = 8 cm , jawbannya b.

19. 240=1/2.8.6.t
240=4.6.t
240=24t
t=240/24= 10 cm

Lp = (2. La)+(Ka.t)
     = (2.1/2.8.6)+{(8+6+10).10}
     = 48+(24.10)= 48+240 = 288 cm^2, jawbannya c.

20.V= (25.6.12)+((20+26).8.1/2.25)
= 1800+46.4.25
= 1800+4600 = 6400 cm^3, jawbannya d.