Travelling at 60 km/h, a person reaches his destination in a certain time. He covers 60% of his journey in $${\frac{2}{5}^{{\text{th}}}}$$ of the time. At what speed (in km/h) should he travel to cover the remaining journey so that he reaches the destination right on time?

A. 48

B. 40

C. 42

D. 36

Answer: Option B

Solution (By Examveda Team)

Let the total time = 5 hours
The distance covered in 5 hours = 5 × 60 = 300 km

Speed = $$\frac{{120}}{3}$$ = 40 km/hr