Robert is travelling on his cycle and has calculated to reach the point A at 2 pm .if he travells at 10kmph;he will reach there at 12 noon if he travels at 15 kmph . at what speed he must travel to reach A at 1p.m	Choose the correct choice from the following
A) 65km
B) 85km
C) 36km
D) 12km
E) 369km
let the distance travelled be x km   Then x/10-x/15=2   3x-2x=60   x=60km   time taken to travel 60km at 10km/hr=(60/10)hrs=60hrs   so robert stared 6hrs before 2p.m ie 8 A.m   therefore the required speed =(60/5)= 
<gadget id="calculator">(60/5)</gadget>
<output>12</output>
12kmph   answer is (12km)
<result>D</result>
Robert is travelling on his cycle and has calculated to reach the point A at 2 pm .if he travells at 10kmph;he will reach there at 12 noon if he travels at 15 kmph . at what speed he must travel to reach A at 1p.m