Jawabanmu

2014-06-04T21:36:51+07:00
V limas = 1/3 X Luas alas X tinggi
1.568 = 1/3 X Luas alas X 24
1568 = 8 X Luas alas
Luas alas = 1568 / 8 = 196 cm2

a.Pnjang rusuk alasnya = √196 cm2 = 14 cm

b.Luas permukaan limas

Luas seluruh sisi tegak = 1/2 X 14 X 25 = 175 cm2

maka luas permukaan limas = Luas alas + 4(luas sisi tegak)
                                             = 196 cm2 +4(175 cm2)
                                              = 196 cm2 + 700 cm2
                                              = 896 cm2


2014-06-04T21:40:28+07:00
A. V = \frac{1}{3}.La.t
1568 = \frac{1}{3}.La.24
1568 = 8La
La = \frac{1568}{8} = 196 cm^{2}
rusuk alas limas = \sqrt{196} = 14 cm
b. Luas limas = La + (4.L sisi tegak)
= 196 cm^{2} + (4.( \frac{25.14}{2} )
= 196 cm^{2} + 700 cm^{2} = 896 cm^{2}