A person walks downhill at 10 km/h, uphill at 6 km/h and on the plane at 7.5 km/h. if the person takes 3 hours to go from a place a to another place b, and 1 hour on the way back, the distance between a and b is 1. 15 km. 2. 23.5 km. 3. 16 km. 4. given data is insufficient to calculate the distance.
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Let the distance from A to B,
downhill=x km
uphill=y km
plane=z km
(x/10)+(y/6)+(z/7.5)=3
(x/6)+(y/10)+(z/7.5)=1
Thus it can be concluded that information is not sufficient, since for 3 variables, 3 equations are required.
downhill=x km
uphill=y km
plane=z km
(x/10)+(y/6)+(z/7.5)=3
(x/6)+(y/10)+(z/7.5)=1
Thus it can be concluded that information is not sufficient, since for 3 variables, 3 equations are required.
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Answer:
15 km is the answer
Step-by-step explanation:
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