Aptitude Discussion

Q. |
Two cities, $A$ and $B$, at a distance of 50 km, are connected by two separate roads. The speed of any vehicle traveling between the two cities on road 1 is 50 km/hr, while the speed on road 2 is ($80/n$) km/hr, where $n$ is the number of vehicles (including the concerned vehicle). If you travel in a vehicle from $A$ to $B$ on road 1 and come back from $B$ to $A$ on road 2 (where there are already three vehicles plying), your approximate average speed is: |

✖ A. |
26 km/hr |

✔ B. |
29 km/hr |

✖ C. |
32 km/hr |

✖ D. |
35 km/hr |

**Solution:**

Option(**B**) is correct

Time taken from road 1 is

\(=\dfrac{50}{50}=1\) hour

Time taken from road 2 is

\(=\dfrac{50}{(80/4)}=2.5\) hour

Total time taken = 3.5 hour

Total distance travelled =100 km

Average speed \(\dfrac{100}{3.5}\) km/hr

= **29 km/hr**

**Sandeep**

*()
*

In question it says 3 vehicle already there so including your vehicle total 4 so its 80/4.

Hope you get it.

Why we have taken n value as only 4...80/4..Kindly let me know..