Question

12. A boy travels a distance of 8 km at the rate of
4 km per hour, 6 km at the rate of 3 km per hour
and 4 km at the rate of 2 km per hour. The
average speed for the entire journey is:
(a) 2 kmph (b) 3 kmph (c) 4 kmph
(d) 6 kmph​

Answer 1

Answer:

ans:(b)

total distance traveled by total time taken

first time 2hr

second 2hr

third 2hr

so total distance =8+6+4=18

average speed = distance traveled /time taken

=18/6=3kmph