Answer : Distance, d = 40 mi.
Explanation :
It is given that,
Fiora starts riding her bike at 20 mi/h. after a while, she slows down to 12 mi/h and maintains that speed for the rest of the trip. the whole trip of 70 mi takes her 4.5 h.
Let for t hours she traveled at 20 mi/h. So, for ( 4.5 - t) h she has traveled with a speed of 12 mi/h.
We know that,
distance covered = speed × time
20 mi/h × t +12 mi/h (4.5 h - t) = 70 mi
t = 2 h
So, the distance covered in 2 h is, d = 20 mi/h × 2 h = 40 mi.
Hence, this is the required solution.
