tolong jawab ya bentar...sklian ma caranya ya

1.)
Diket: Ka= 60km/jam
Kb= 80km/jam
Wa= 2jam
Wb...?

[tex] ka \times wa= kb \times wb \\ \: \: \: 60 \times 2 \: = 80 \times wb \\ \: \: \: \: \: \: \: \: \: 120= 80wb \\ \: \: \: \: \: \: \: \: \frac{120}{80} = wb \\ \: \: 1.5jam= wb[/tex]

2.) 8 segitiga

3.)
[tex] = \frac{1}{2 - \frac{1}{1 - \frac{1}{3} } } \\ = \frac{1}{2 - \frac{1}{ \frac{ 3 - 1}{3} } } \\ = \frac{1}{2 - (\frac{1}{ \frac{2}{3} } )} \\ = \frac{1}{2 - (1 \times \frac{ 3}{2} )} \\ = \frac{1}{2 - \frac{3}{2} } \\ = \frac{1}{ \frac{4 - 3}{2} } \\ = \frac{1}{ \frac{1}{2} } \\ = 1 \times \frac{2}{1} \\ = 2[/tex]

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