Question

apart. M
8.
lies on
object travels
of 10 mls in
Two points, L and N, are 160 m apart.
the straight line joining L and N. An object
from L to M at an average speed of 10
6 seconds and then from M to N at an
speed of 25 m/s. Find the average spee
object for its entire journey from L to N.
at an average
erage speed of the

Answer 1

16m/s is the Average Speed of   Entire journey  when 160 m is travelled for 6 sec at 10 m/s & remaining at 25 m/s

Step-by-step explanation:

LM Distance covered at an average speed of 10 m/s in 6 seconds

=> LM = 10 * 6 = 60 m

M lies on LN => LN = LM + MN

=> 160 = 60 + MN

=> MN = 100 m

Remaining Distance = 100m

Average speed = 25  m/s

Time Taken = 100/25 = 4sec

Total Time taken = 6 + 4= 10 sec

Total Distance = 160 m

Average Speed = 160/10  = 16 m/s

16 m/s is the average speed of entire journey

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