Car A takes 10 min lesser than Car B which is travelling at an average speed of 40mph to cover a distance of 60 miles. What is the average speed of car A?  Select:
A) 30
B) 35
C) 45
D) 50
E) 55
Time taken by Car B to cover 60 miles=60/40= 
<gadget id="calculator">60/40</gadget>
<output>3/2 = around 1.5</output>
1.5 hrs=90 min   Time taken by Car A to cover 60 miles=80min   Average speed of Car A=60/80= 
<gadget id="calculator">60/80</gadget>
<output>3/4 = around 0.75</output>
0.75 miles per min= 45 miles per hour.   Answer: 45
<result>C</result>
Car A takes 10 min lesser than Car B which is travelling at an average speed of 40mph to cover a distance of 60 miles. What is the average speed of car A?