Question
A person travelled a distance of 50 km in 8h. He covered a part of the distance on foot at the rate of 4km/h and a part on a bicycle at the rate of 10km/hr. How much distance did he travel on foot?
Answer: Option B
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Let he travels by on foot be x h
Then according to the question.
4x+10(8-x) = 50
=> 80-6x =50
=> 6x=30
=> X=5h
Therefore, Distance travelled on the foot = 4x5 =20km.
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