4. Awoman runs 10 km in 30 minutes. What is her speed per hour?
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Answer:
speed = 20km/hr
Explanation:
To find : speed (in km/h)
Given :
distance = 10km
time = 30 minutes = (30/60) hour
Formula used :
Speed = distance ÷ time
Solution :
speed = 10 ÷ (30/60) km/hr
speed = 10×60/30
speed = 20km/hr
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