Question

plz amsewr...
it is very necessary

Answer 1

while going
s=vt
6/2.5=t1
while coming back
s=vt
6/4=t2
therefore avg. speed=total distance/total time
=12/(6/2.5+6/4)
12*5 0/195
=40/13

Answer 2

b) 40/13
please mark this answer brainliest.