A Man travelled a distance of 48 km in 7 hours. He travelled partly on foot at 4 km/hr and partly on
bicycle at 9 km/hr. What is the distance travelled on foot?
Choose the correct choice from the following answers
A) 16 km  B) 20 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   Distance = Speed * Time, and Total distance = 48 km   So,   4x + 7(9-x) = 48   =&gt; 3x = 15   =&gt; x = 5   So distance traveled on foot = 4(5) = 20 km   Answer: Option 20 km
<result>B</result>
A Man travelled a distance of 48 km in 7 hours. He travelled partly on foot at 4 km/hr and partly on
bicycle at 9 km/hr. What is the distance travelled on foot?