A man travelled a distance of 150 km in 18 hours. He travelled partly on foot at 5 km/h and partly on bicycle at 10 km/h. What is the distance travelled on bicycle ?

120 km

Let distance traveled on bicycle = B km

So , Distance covered on foot = (150 - B ) km

According to question ,

\(\frac{B}{10}\) + \(\frac{150 - B }{5}\) = 18

\(\frac{B + 300 - 2B }{10}\) = 18

B = 120 km

So , Distance covered by bicycle is 120 km