The answer is: " 48 [tex] \frac{km}{h} [/tex]" .
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Note: 30 minutes is "1/2 h" = 0.5 h ;
As such:
"2 hours and 30 minutes: = 2 h + 0.5 h = 2.5 h " ;
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So we have:
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120 km / 2.5 h ;
= (120 / 2.5) km / h = (1200/25) km/hr = 48 [tex] \frac{km}{h} [/tex] .
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