A boy went to his school at a speed of 12 km hr and returned to his house at a speed of 8 km hr If h...........

Quantitative Aptitude (CDS) Time & distance

A boy went to his school at a speed of 12 km/hr and returned to his house at a speed of 8 km/hr. If he has taken 50 minutes for the whole journey, what was the total distance walked?

4 km

8 km

16 km

20 km

छोटे Courses बड़े Results

Master Time & distance

Prepare through Micro-courses

Try Now

Explanation:

Distance travelled by the boy from house to school in 1 hr. i.e. 60 minutes = 12 km
Distance travelled by the boy from house to school in 1 minute = 1260=15km
Similarly,
distance travelled by the boy from school to house in 60 minutes = 8 km
Distance travelled by the boy from school to house in
1 minute= 8/60=2/15 km
This means, total distance travelled in 2 minutes
Therefore, total distance travelled in I minutes = 15+2/15=13km
Therefore, total distance travel in 1 minute = 13×2=16km
Thus, total distance travelled in 50 minutes = 16×50=8.3333 ≈8km
Hence option (2)