P and Q walk around a circular track. They start at 7 a.m from the same point in the opposite directions. P and Q walk at a speed of 4 rounds per hour and 7 rounds per hour respectively. How many times shall they cross each other before 10 a.m
Choose the correct choice from the following choices.
A) 30	B) 31	C) 32	D) 33	E) 34
Explanation:   Relative speed = (4+7)= 
<gadget id="calculator">(4+7)</gadget>
<output>11</output>
11 rounds per hour   So, they cross each other 11 times in an hour hence, they cross 33 times before 10 a.m   Answer: Option 33
<result>D</result>
P and Q walk around a circular track. They start at 7 a.m from the same point in the opposite directions. P and Q walk at a speed of 4 rounds per hour and 7 rounds per hour respectively. How many times shall they cross each other before 10 a.m