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V limas = 1/3.L alas.t
= 1/3.p.l.t
= 1/3.36.14.24
= 8.36.14
= 4032 cm kubik
b)
1/2.AB = 1/2.36 = 18 cm
maka :
t.sisi bidang tegak
= √24²+18²
= √576+324
= √900
= 30 cm
1/2.BC = 1/2.14 = 7 cm
maka :
t.sisi bidang tegak
= √24²+7²
= √576+49
= √625
= 25 cm
jadi,
L permukaan limas
= L alas + jumlah L sisi bid.tegak
= p.l + 2.1/2.a.t + 2.1/2.a.t
= 36.24 + 36.30 + 14.25
= 864 + 1080 + 350
= 2294 cm²
V = ⅓ . 36 . 14 . 24
V = 4032 cm³
============
Lp = La + ½ . t . Ka
Lp = 36 . 14 + ½ . 24 . 2(36 + 14)
Lp = 504 + 12(50)
Lp = 504 + 1200
Lp = 1704 cm²