13. A girl walks 12 km at the speed of 3 km/h. What change should she make in her speed to
take (i) an hour less and (ii) an hour more to cover the distance?
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Answer:
According to question, she takes one more hour to reach the distance. Therefore, new time will be 5 h. Therefore, she will reduce her speed from 3km/h to 2.4 km/h
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Answer:
total distance=12km
time taken by her speed=4hours
i)the girl should be walking at 4km/hr to go an hour less
iithe girl shld walk at 2km/hr to make an hour more to cover the distance
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