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) 9 km/hour	B) 10 km/hour	C) 11 km/hour	D) 12 km/hour	E) None of these
Explanation:   We need to calculate the distance, then we can calculate the Ɵme and finally our answer.   Lets solve this,   Let the distance travelled by x km   Time = Distance/Speed   x10−x15=2[because, 2 pm - 12 noon = 2   hours]3x−2x=60x=60.Time=DistanceSpeedTime@10km/hr=6010=6hours   So 2 P.M. - 6 = 8 A.M   Robert starts at 8 A.M.   He have to reach at 1 P.M. i.e, in 5 hours   So, Speed = 60/5= 
<gadget id="calculator">60/5</gadget>
<output>12</output>
12 km/hr   Answer: 12 km/hour
<result>D</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.?