A person walks a distance of 18 kms at a particular speed. For the next 30 kms he increases his speed by 2 kmph. Had he walked the entire distance at 3 kmph more than his initial speed, he would have reached 4 hours earlier. Find his initial speed.	Pick
A) 3 kms/hr
B) 2 kms/hr
C) 4 kms/hr
D) 5 kms/hr
E) None of these
let x be the initial speed , then   18/x+30/x+2=12 , we get 12 from 3*4= 
<gadget id="calculator">3*4</gadget>
<output>12</output>
12   by solving we get x=1,-3   ANSWNone of theseR:None of these
<result>E</result>
A person walks a distance of 18 kms at a particular speed. For the next 30 kms he increases his speed by 2 kmph. Had he walked the entire distance at 3 kmph more than his initial speed, he would have reached 4 hours earlier. Find his initial speed.