Subject: General Aptitude · Chapter: Time and Distance · Exam: · Marks: · Difficulty:
$A$ and B walk around a circular track. They start at 8 a.m. from the same point in the opposite directions. A and B walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. How many times shall they cross each other before 9.30 a.m.?
(a)5
(b)6
(c)7
(d)8
Answer
Answer (as printed): C
Explanation
Relative speed = (2 + 3) = 5 rounds per hour. So, they cross each other 5 times in an hour and 2 times in half an hour. Hence, they cross each other 7 times before 9.30 a.m.
Explanation as extracted from the printed page; notation may be imperfect.