Question: Two friends start running from the same point at the same time in the same direction. One friend runs at a speed of 10 km/h, while the other runs at a speed of 12 km/h. After how many hours will the faster friend be 6 km ahead of the slower friend?
a) 1 hour
b) 2 hours
c) 3 hours
d) 4 hours
Solution:
Let the time taken to be t hours.
Relative speed (difference in speed):
12−10=2 km/h
Time taken for the faster friend to be 6 km ahead:
Time=Distance/Relative speed = 6⁄2 = 3 hours
Hence, the faster friend will be 6 km ahead after 3 hours.
Practice makes perfect. We recommend you to practice topic-wise tests https://rankmadeeasy.com/courses-and-test-series . Our expert team has prepared these tests to help you become confident in each topic.
Our Social Media Presence –
https://youtube.com/@rankmadeeasy
https://www.facebook.com/groups/rankmadeeasy
https://www.facebook.com/RankMadeEasy
https://www.instagram.com/rankmadeeasy1
https://twitter.com/rankmadeeasy