A car during its journey travels 30 minutes at a speed of 40 kmph, another 45 minutes at a speed of 60 kmph, and 2 hours at a speed of 70 kmph.The average speed of the car is Choose the correct choice from the following answers
A) 63.07 kmph  B) 64 kmph  C) 62.02 kmph  D) 64.02 kmph  E) None of these
First car travels 30 min at speed of 40 kmph   distance = 40 x 1/2 = 20 m   Then car travels 45 min at a speed of 60 kmph   distance = 45 min at speed of 60 kmph   distance = 60 x 3/4 = 45 m   at last it travels 2 hours at speed of 70 kmph   distance = 70 x 2 = 140 m   Total distance = 20 + 45 + 140= 
<gadget id="calculator">20 + 45 + 140</gadget>
<output>205</output>
205   Total time= 1/2 + 3/4 + 2= 
<gadget id="calculator">1/2 + 3/4 + 2</gadget>
<output>13/4 = around 3.25</output>
3.25   63.07 kmphverage speed of the car= 205/3.25 = 63.07   63.07 kmphNSWER:63.07 kmph
<result>A</result>
A car during its journey travels 30 minutes at a speed of 40 kmph, another 45 minutes at a speed of 60 kmph, and 2 hours at a speed of 70 kmph.The average speed of the car is