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=√2500-1600
=√900
=30
15]. R=14
r=4
p=26
=√P²-(R-r)²
=√26²-(14-4)²
=√676-100
=√576
=24
16].=22/7x14.(14+2.10)
=44.(34)
=1496 cm²
no 17 lupa
gunakan pithagoras
jarak = V(50^2 - 40^2)
= V(2500 - 1600)
= V900
= 30 m
jawaban A
no 15)
l = V(p^2 - (R-r)^2)
= V(26^2 - (14-4)^2)
= V(676-100)
= V576
= 24 cm
jawaban D
no 16)
luas tabung tanpa tutup
= phi. r .(r+2t)
= 22/7 . 14 .(14+20)
= 44 (34)
= 1496 cm^2
jawaban B
no 17)
volum air yg ditambahkan
= (1-2/3) x (18)^3
= 1/3 x 18^3
= 1944 cm^3
jawaban C
catatan :
tanda V = akar
^ = pangkat