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.?
Answers:
A) 8 kmph
B) 11 kmph
C) 12 kmph
D) 14 kmph
E) 16 kmph
Explanation:   Let the distance travelled by x km.   Then,	x/10-x/15=2   3x - 2x = 60   x = 60 km.   Time taken to travel 60 km at 10 km/hr =60/10= 
<gadget id="calculator">60/10</gadget>
<output>6</output>
6 hrs.   So, Robert started 6 hours before 2 P.M. i.e., at 8 A.M.   Required speed=	60/5= 
<gadget id="calculator">60/5</gadget>
<output>12</output>
12 kmph   ANSWER IS 12 kmph
<result>C</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.?