A man covers 9/20 distance by bus and the remaining 10 km on foot. His total journey (in km) is :

Answer: Option C

The man covers $$\frac{9}{20}$$ of the journey by bus
∴ Remaining journey :
= 1 - $$\frac{9}{20}$$
= $$\frac{11}{20}$$
⇒ According to the question,
$$\frac{11}{20}$$ of the journey :
= $$\frac{20}{11}$$ × 10
= 18.18 km