71. volume kubus = 23×10×30
=6900
volume baju = ⅓×6900
=2300
volume jaket = 2/5×6900
= 2760
volume kemeja = 6900-2300-2760
=1840 (C)
Jawab:
70.C
Penjelasan dengan langkah-langkah
Luas lingkaran = πr²
314 = 3,14 . r²
r² = 314 : 3,14
= 100
r = √100
= 10
Lp tabung = 2πr.(r+t)
= 2 . 3,14 . 10 . ( 10 + 10 )
= 62,8 . 20
= 1256
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71. volume kubus = 23×10×30
=6900
volume baju = ⅓×6900
=2300
volume jaket = 2/5×6900
= 2760
volume kemeja = 6900-2300-2760
=1840 (C)
Jawab:
70.C
Penjelasan dengan langkah-langkah
Luas lingkaran = πr²
314 = 3,14 . r²
r² = 314 : 3,14
= 100
r = √100
= 10
Lp tabung = 2πr.(r+t)
= 2 . 3,14 . 10 . ( 10 + 10 )
= 62,8 . 20
= 1256