A person covers a distance of 42 km in 5 hours. He covered some distance on foot at the rate of 6 km/hr and some distance on cycle at the rate of 10 km/hr. Find the total distance covered by the person on foot.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 12 km
Let the distance traveled on foot be 'x' km.
x/6 + (42 - x)/10 = 5
5x + 126 - 3x = 5 × 30
2x = 150 - 126
2x = 24
x = 12 km.