Alya rides a motorbike from city A to city B with an average speed of 54 km/hour. After 20 minutes, Manda biked the same route from town B to A with an average speed of 66 km/hour. The distance from city A to city B is 108 km. The distance from city A when the two pass is...km ?
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[tex]distance\: difference \\ speed \times time \\ 54 \frac{km}{h} \times \frac{20}{60}h \\ 18 \: km\\ \\ time \: when \: the \: two \: pass \\ \frac{td - dd}{s1 + s2} \\ \\ \frac{108 \: km - 18 \: km}{54 \frac{km}{h} + 66 \frac{km}{h} } \\ \\ \frac{90}{ \frac{120}{h} } = 0.75 \: h \\ \\ distance \: when \: the \: city \: pass \\ distance \: difference + (s1 \times tp) \\ 18 \: km + (54 \frac{km}{h} \times 0.75 \: h) \\ 18 \: km + 40.5 \: km \\ 58.5 \: km[/tex]
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