A person travelled a distance of 50 km in 8 h. He covered a part of the distance on foot at the rate of 4 km/h and a part on a bicycle at the rate of 10 km/h. How much distance did he travel on foot?
Correct Answer: 20 km
Explanation:
Let T h, he travels on foot.
∴ 4T + 10(8 - T) = 50
⇒ 80 - 6T = 50
⇒ 6T = 30,
∴ T = 5 h
∴ The distance travelled on foot = 4 x 5 = 20 km
