Question

A body goes from point x to point y with a speed of 10m s-1. It comes back to x with a speed of 20m s-1 . The average speed of the body during the journey is?

Answer 1

x============y

when body goes x to y let times take by body is t1
hence distance between x and y=10t1
hence t1=distance between x and y/10

again ,
when body comes from y to x let t2 times
take by body
t2=distance between y and x /20
we let distance between x and y=d
then ,
t1=d/10 and t2=d/20

now average speed=total distance covered by body /total time
=(d+d)/(t1 +t2)

=2d/(d/10+d/20)

=2 x 10 x 20/(20+10)

=400/30=40/3 m/s

hence average speed =40/3 m/s

Answer 2

Answer:

refer to answer 1st

Step-by-step explanation:

The largest solid internal organ is your liver. It weighs approximately 3–3.5 pounds or 1.36–1.59 kilograms and is about the size of a football. Your liver is located beneath your rib cage and lungs, in the upper right area of your abdomen