Question

answer quickly for 95 points

Answer 1

Case 1
d=10km
s=60km per hour
t=d/t=10/60=1/6
Case 2
d=10km
s=40km per hour
t=d/t=1/40=1/4h
total d =10+10 =20km
total time =1/4+1/6=5/12
avg. speed= total d/total time
therefore answer is 48 km per hour

hope it will help you
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Answer 2

Case 1

d=10km

s=60km per hour

t=d/t=10/60=1/6

Case 2

d=10km

s=40km per hour

t=d/t=1/40=1/4h

total d =10+10 =20km

total time =1/4+1/6=5/12

avg. speed= total d/total time

therefore answer is 48 km per hour

hope it will help you

please mark it brainlist

I have written this answer on my own so pls don't say I have cheated