Question
Quantitative Ability and Data Interpretation Question on Time and Work
Four friends, Ashish, Brian, Chaitra, and Dorothy, decide to jog for 30 minutes inside a stadium with a circular running track that is 200 metres long. The friends run at different speeds. Ashish completes a lap exactly every 60 seconds. Likewise, Brian, Chaitra and Dorothy complete a lap exactly every 1 minute 30 seconds, 40 seconds and 1 minute 20 seconds respectively. The friends begin together at the start line exactly at 4 p.m. What is the total of the numbers of laps the friends would have completed when they next cross the start line together ?
A
43
B
36
C
They will never be at the start line together again before 4:30 p.m.
D
47
E
28
Answer
47
Explanation
Solution
The correct answer is option (D):47