Jawapan

2016-01-25T21:29:37+08:00
Kon + silinder + hemisfera
=1/3×Πj²t + Πj² + 2/3Πj³
=1/3×22/7×7²×24 + 22/7×7²×10 + 2/3×22/7×7³
=1232 + 1540 + 718.67
=3490.67cm²

#tinggi kon dapat sebab 41-10-7=24
2016-01-26T11:45:37+08:00
Tinggi kon = 24 cm
maka, sisi lengkung, L
L² = 24² + 7²
L² = 625
L = √625
L = 25 cm

luas permukaan kon
= π j L
= 22/7 x 7 x 25
= 550 cm²

luas permukaan silinder
= 2 π j h
= 2 x 22/7 x 7 x 10
= 440 cm²

luas permukaan hemisfera
= 2 π j²
= 2 x 22/7 x 7²
= 308 cm²

luas permukaan gabungan
= 550 + 440 + 308
= 1298 cm²