Question

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 ?

Answer 1

Answer:

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