Grandpa walks 1.5 km
In 1 hour 20 minutes
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Answer:
Time= 1hr20min
Convert minute into hr
1min = 1/60hr
20min = 20/60 = 1/3hr
Total time = 1+1/3= 4/3hr
distance = 1.5km
Speed = Distance/Time
Speed = 1.5/4/3
Speed = 9/8
Speed=1.125km/hr Answer
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