Georgina enters a 12 km race. She wants to finish the race in one hour and twenty minutes.
She starts off jogging at a speed of 7 km/h. After 30 minutes, she realizes that she needs to
increase her speed to finish the race in her desired time. For the remaining time, what speed
must she run at to finish the race in exactly one hour and twenty minutes?
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Step-by-step explanation:
7 hour= 140 min................
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