When not moving on the sidewalk, Maya can walk the length of the sidewalk in 7 minutes. If she stands on the sidewalk as it moves, she can travel the length in 4 minutes. If Maya walks on the sidewalk as it moves, how many minutes will it take her to travel the same distance? Assume she always walks at the same speed, and express your answer as a decimal to the nearest tenth.	Pick one.
A) 2.9
B) 2.5
C) 2.7
D) 2.1
E) 2.2
Explanation:   Assume distance of sidewalk "x"   Speed 1 (moving on sidewalk)   Speed 2 (moving off sidewalk)   Since both the movements are in same direction, we can do speed 1 + speed 2   Speed 1 = x4x4   Speed 2 = x7x7   Speed 1 + speed 2 = 11x2811x28 = = 0.39286x   Now new time while moving on sidewalk = x0.39286xx0.39286x = 2.54544   Hence, the answer is 2.5   Answer: 2.5
<result>B</result>
When not moving on the sidewalk, Maya can walk the length of the sidewalk in 7 minutes. If she stands on the sidewalk as it moves, she can travel the length in 4 minutes. If Maya walks on the sidewalk as it moves, how many minutes will it take her to travel the same distance? Assume she always walks at the same speed, and express your answer as a decimal to the nearest tenth.