A person covers a distance of 36 km in 5 hrs . Some part of this journey is covered on foot at the speed of 6 km/hr and the rest by cycle at the speed of 9 km/hr. Find the distance covered on foot .
Answer & explanation
Correct answer: option 3
Distance = Speed × Time
Total Distance = 36 km
Total Time taken = 5 hours
Let the time he traveled on foot be x hours with speed 6 km/hr
And time he traveled by bicycle is ( 5 - x ) hours with speed 9 km/hr
According to question ,
6 × x + 9 × ( 5 - x ) = 36
6x + 45 - 9x = 36
3x = 9
x = 3 hours
So , distance traveled by foot = 3 × 6 = 18 km