Two men starting from the same place walk at the rate of 5 kmph and 5.5 kmph respectively. What time will they take to be 5.5 km apart, if they walk in the same direction?  Choose the correct option:	A) 11 hrs	B) 14 hrs	C) 15 hrs	D) 17 hrs	E) None
Sol.   to be 0.5 km apart, they take 1 hour.   To be 5.5 km apart, they take [1/0.5 * 5.5= 
<gadget id="calculator">1/0.5 * 5.5</gadget>
<output>11</output>
11 hrs.   11 hrsnswer 11 hrs
<result>A</result>
Two men starting from the same place walk at the rate of 5 kmph and 5.5 kmph respectively. What time will they take to be 5.5 km apart, if they walk in the same direction?