31.) 57:141 keduanya dibagi 3 --->19:47
32.) 21/ 35 x 100= 0,6 x 100 = 60%
33.) 30/100 x 2.600 orang= 780 orang
34.)52.000,-/65.000,- x 100%= 80%
Maka, potongan harganya:
100%-80%=20%
35.)
L = 1/4 π x d²
616 = 1/4 x 22/7 d²
1/4 d² = 616 / 22/7
1/4 d² = 196
d² = 196 x 4
d = √784
d = 28 cm
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31.) 57:141 keduanya dibagi 3 --->19:47
32.) 21/ 35 x 100= 0,6 x 100 = 60%
33.) 30/100 x 2.600 orang= 780 orang
34.)52.000,-/65.000,- x 100%= 80%
Maka, potongan harganya:
100%-80%=20%
35.)
L = 1/4 π x d²
616 = 1/4 x 22/7 d²
1/4 d² = 616 / 22/7
1/4 d² = 196
d² = 196 x 4
d = √784
d = 28 cm