a person left her home at 11.43 am and travelled to her friends house, a distance of 31km. she arrived at 12.09 pm. what was her average speed in
(a) km/h
(b) m/s

please show me how to calculate the answer.

Question

a person left her home at 11.43 am and travelled to her friends house, a distance of 31km. she arrived at 12.09 pm. what was her average speed in 
(a) km/h
(b) m/s

please show me how to calculate the answer.

hartnn · Answer

can u find how many minutes it took person to walk 31km?

anonymous · Answer

26 minutes

anonymous · Answer

wait im not sure

hartnn · Answer

no u are right :) 17+9=23....now it takes 26min for 31 km....so how much distance in 60 min??(that is one hour)......can u find that?

anonymous · Answer

71.54

anonymous · Answer

this question is under sub topic rate of changes, so can you show me the correct method. i want to understand the working :-/

hartnn · Answer

71.54 km/hr is correct....to convert to m/sec,just multiply by 5/8