Question

Ann has walked 8 km with a velocity of 4 km/h. Now she will run some time with a velocity of 8 km/h.How long does she have to run in order to have an overall average velocity of 5 km/h?
SOMEONE PL Z ANSWER IT AND TELL ME THE METHOD? i think it 35 or 40 min

Answer 1

I think this is correct
is the answer 0.4hours