Jaya travelled a distance of 50 km in 8 hours. She covered a part of distance on foot at the rate of 4 km per hour and a part on a bicycle at the rate of 10 km per hour. How much distance did she travel on foot ?
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A person travelled a distance of 50km in 8 hrs. he covered a part of the distance on foot at the rate of 4 km per hour and a paet on a bicycle at the rate of 10 km per hour
Total Distance = 50 km
Total Time taken = 8 hrs
Let say he covered X km on Foot
Speed on Foot = 4km/Hr
Time taken on Foot = X/4 hrs
Distance covered on Bicycle = 50 - X km
Speed on Bicycle = 10 km/Hr
Time taken on Bicycle = (50-X)/10 = 5 - X/10 hr
Time taken on Foot + Time taken on Bicycle = Total Time
=> X/4 + 5 - X/10 = 8
=> (5X - 2X)/20 = 3
=> 3X = 60
=> X = 20
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