pleasee tolong jawab kan pakai cara besok dikumpul

1. Jar jari lingkaran  = 35 cm
Keliling lingkaran = 2 π r = 2 x 22/7 x 35 cm =  20 cm

2. Panjang sisi kubus = s
luas sisi kubus = 1.176 cm²
6 x s  x s = 1.176
s x s = 1.176 : 6 = 196
s = √196
s= 14 cm

3.
uang A = 2/3 uang B
uang B = 2/5 uang C
jumlah uang mereka = rp. 250.000
A + B + C = 250.000
2/3B  + 2/5 C + C = 250.000
2/3 (2/5 ) C + 2/5 C + C = 250.000
4/15 C+ 2/5 C + C= 250.000 ...kalikan 15
4C + 6C + 15 C = 250.000 x 15
25 C = 250.000 x 15
C= 250.000 x 15 / 25 = 150.000
B = 2/5 C = 2/5 x 150.000 = 60.000
A = 2/3 B = 2/3 x 60.000 = 40.000

atau cara lain
A : B  = 2 : 3
B : C = 2 : 5
samakan perbandingan B = 6
A: B : C = 4: 6 : 15
jumlah perbandingan = 25
jumlah uang = Rp 250.000
uang A = 4/25 x 250.000 = 40.000
uang B = 6/25 x 250.000 = 60.000
uang C = 15/25 x 250.000 = 150.000