Question

A man walks at 5km/h for 6 hours and 4 km/h for 12 hours what is his average speed

Answer 1

total distance covered in first case is 30 km
total distance covered in second case is 48 km
total distance covered in both cases is 78 km
total time taken in both cases is 18 hrs
avg speed = 78/18 = 4.33 km/hrs
hop it helps

Answer 2

Answer:

given

distance= 5×6 km = 30 km

and 4×12 km= 48 km

now,

30+48=78km

time = 6+12= 18 hrs

average speed = d/t

=78 /18

=13/3

= 4.34 km/ h