A Man travelled a distance of 80 km in 10 hours. He travelled partly on foot at 5 km/hr and partly on bicycle at 9 km/hr. What is the distance travelled on foot? Select:  A) 16 km  B) 14 km  C) 12 km  D) 10 km  E) None of these
Explanation:   Let the time in which he travelled on foot = x hour   Time for travelling on bicycle = (9 - x) hr   10 kmistance = Speed * Time, and Total distance = 80 km   So,   5x + 10(9-x) = 80   =&gt; 5x = 10   =&gt; x = 2   So distance traveled on foot = 5(2) = 10 km   Answer: Option 10 km
<result>D</result>
A Man travelled a distance of 80 km in 10 hours. He travelled partly on foot at 5 km/hr and partly on bicycle at 9 km/hr. What is the distance travelled on foot?