Martha takes a road trip from point A to point B. She drives x percent of the distance at 70 miles per hour and the remainder at 50 miles per hour. If Martha's average speed for the entire trip is represented as a fraction in its reduced form, in terms of x, which of the following is the numerator?  Choose the correct choice from the following options
A) 110
B) 35,000
C) 1,100
D) 3,000
E) 30,000
total distance = d   total time taken = x/(100*70) + (100-x)/(100*50)   speed = distance / time   gives numerator = 35000   Answer : 35,000
<result>B</result>
Martha takes a road trip from point A to point B. She drives x percent of the distance at 70 miles per hour and the remainder at 50 miles per hour. If Martha's average speed for the entire trip is represented as a fraction in its reduced form, in terms of x, which of the following is the numerator?