Question : Two donkeys are standing 400 metres apart. The first donkey can run at a speed of 3 m/sec and the second can run at 2 m/sec. If two donkeys run towards each other, after how much time (in seconds) will they bump into each other?
Option 1: 60
Option 2: 80
Option 3: 400
Option 4: 40
Correct Answer: 80
Solution :
Here the distance between two donkeys = 400 metres.
Speed of the first donkey = 3 m/sec.
Speed of the second donkey = 2 m/sec.
If both running in opposite directions relative speed = (3 + 2) = 5 m/sec.
So, the time taken to bump into each other = $\frac{400}{5}=80$ sec.
Hence, the correct answer is 80.
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Result | Eligibility | Application | Selection Process | Preparation Tips | Admit Card | Answer Key
Get Updates Brochure
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
Upcoming Exams
Trending Articles around SSC CGL
