A man travelled a distance of 60 km in 7 hours. He travelled partly on foot @ 6 km/hr and partly on bicycle @ 12 km/hr. What is the distance (in kms) travelled on foot?
1). 15
2). 9
3). 48
4). 24
Let the distance travelled on foot = x km
According to the question,
x/6 + (60 - x)/12 = 7
⇒ 2x + 60 - x = 7 × 12
⇒ x = 84 - 60 = 24 km
∴ The distance travelled on foot is 24 km