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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 ?
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- 10 km
- 20 km
- 30 km
- 40 km
Correct Option: B
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
