Diketahui panjang diagonal alas sebuah kubus 10 cm. hitunglah a. luas permuaan kubus b. volume kubus
Avicennaa
Diagonal alas = s√2 ---> rumusnya 10√2 = s√2 s = (10√2) / √2 s = 10 maka luas permukaan kubus = 6 x s x s = 6 x 10 x 10 = 600 volume kubus = s x s xs = 10 x 10 x 10 = 1000
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ananekusuma21
Diagonal alas = diagonal bidang 10√2 = s√2 s = 10 cm maka : a) Lp kubus = 6.s² = 6.10² = 6.100 = 600 cm²
10√2 = s√2
s = (10√2) / √2
s = 10
maka
luas permukaan kubus = 6 x s x s
= 6 x 10 x 10
= 600
volume kubus = s x s xs
= 10 x 10 x 10
= 1000
10√2 = s√2
s = 10 cm
maka :
a) Lp kubus = 6.s²
= 6.10²
= 6.100
= 600 cm²
b) V kubus = s.s.s
= 10.10.10
= 1000 cm kubik