A boy can reach a certain place in 18 hours. If he reduces his speed by 1/30th, he goes 3 km less in that time. Find his speed. Options.
A) 5 km/hr. B) 6 km/hr C) 8 km/hr D) 14 km/hr E) None of these
Explanation :   Solution: Let the speed be x km/hr. then,   18x - (18 * 29x/30) = 3   =&gt; 3X/5= 3   =&gt; x = 5 km/hr.   5 km/hr.nswer : 5 km/hr.
<result>A</result>
A boy can reach a certain place in 18 hours. If he reduces his speed by 1/30th, he goes 3 km less in that time. Find his speed.