Lorri took a 240 km trip to Waterloo. On her way there, her average speed was 120 km/h. She was stopped for speeding, so on her way home her average speed was 80 km/h. What was her average speed, in km/h, for the entire round-trip?

Average speed is

Step-by-step explanation:

Given: Total distance covered by Lorri is 240 km. For some distance his speed was 120 km/h and for the rest of the distance, speed is 80 km/h

To find: Average speed for the entire trip

Solution:

On her way to Waterloo:

Distance covered = 240 km

Speed = 120 km/h

Time = Distance /speed =

On her way to home:

Distance covered = 240 km

Speed = 80 km/h

Time = Distance /speed =

Total distance covered by Lurri = 240 + 240 = 480 km

Total time =

Average speed = Total distance/Total time taken =

c) the median for town a 30" is greater than the median for town b 25"

step-by-step explanation:

town a, median = q2 = 30

town b, median - q2 = 25

so the median for town a 30" is greater than the median for town b 25"

the answer for the second equation is (4,0)