A man travelled a distance of 72 km in 12 hours. He travelled partly on foot at 5 km/hr and partly on bicycle at 10 km/hr. The distance travelled on foot is :

Answer: Option B

According to the question,


5 units → 12 hr
1 unit → $$\frac{12}{5}$$ hr and,
4 units → $$\frac{12}{5}$$ × 4
             = $$\frac{48}{5}$$
Distance travelled on foot :
= $$\frac{48}{5}$$ × 5
= 48 km