Problem Solving
试题详情
题目：
Reid took 1 hour to cycle from his home to his college.
The graph shows Reed's distance from his college during
That hour. Reid's average speed for the last 15 minutes
Of the hour was how many kifometers per hour greater
Than his average speed for the first 45 minutes?
选项:
A、3
B、4
C、5
D、6
E、7
