Robert is travelling on his cycle and has calculated to reach point A at 2 P.M. if he travels at 10 kmph, he will reach there at 12 noon if he travels at 15 kmph. At what speed must he travel to reach A at 1 P.M.?
Choose the correct answer:	A) 8	B) 12	C) 11	D) 16	E) 18
Explanation :   Let the distance travelled by x km.   Then,   =&gt; (x/10) - (x/15) = 2   =&gt; 3x - 2x =60   =&gt; x = 60   =&gt; Time taken to travel 60 km at 10 km/hr = 60/10= 
<gadget id="calculator">60/10</gadget>
<output>6</output>
6 hours.=&gt; So, Robert started 6 hours before 2 P.M. i.e., at 8 A.M.   Therefore ,   Speed required = (60/5) km/hr   = 12 km/hr   Answer : 12
<result>B</result>
Robert is travelling on his cycle and has calculated to reach point A at 2 P.M. if he travels at 10 kmph, he will reach there at 12 noon if he travels at 15 kmph. At what speed must he travel to reach A at 1 P.M.?