A man travelled a distance of 80 km in 7 hrs partly on foot at the rate of 8 km/hr and partly on bicycle at 16 km/hr. The distance travelled on the foot is :
Q. A man travelled a distance of 80 km in 7 hrs partly on foot at the rate of 8 km/hr and partly on bicycle at 16 km/hr. The distance travelled on the foot is :
Answer: 32 km
Notes: Journey on foot = x km Journey on cycle = (80 - x) km $latex \therefore \frac{x}{8}+\frac{80-x}{16} = 7&s=1$ $latex => \frac{2x+80-x}{16} = 7&s=1$ $latex => x+80=16\times 7 = 112$ $latex => x = 112-80 = 32km$ Hence option [A] is correct answer.