Question

Mr. Patel walked 6 km to reach the station from his house, then he boarded a train whose average speed was 60 km/hr and thus he reached his destination. In this way, he took a total of 3 hours. If the average speed of the entire journey was 32 km/hr then the average speed of walking is:

• A. 3 km/hr
• B. 4.5 km/hr
• C. 4 km/hr
• D. none of these

Answer 1

The correct option is C

4 km/hr

Go through options
$\frac{6}{4}$ = 1.5 hours, when he was walking
Therefore time of journey by train = 3 - 1.5 = 1.5
Now, the distance travelled by train = 1.5 $\times$ 60 = 96 - 6 = 90
Hence correct.

Alternatively:
Total distance = 32 $\times$ 3 = 6 + 60 $\times$ x
$\Rightarrow$ x = 1.5 hours
Thus, the speed of walking $=\frac{6}{1.5}=$ = 4 km/hr