Question

A body moving along a straight path covers one-third of a
distance with a velocity of 5 Kmph and the rest of the path
with a velocity of 20 Kmph. Find the average velocity of the
body.​

Answer 1

Answer:

Let the length of the path be 'x' the time taken by the body to reach (1/3)rd of he distance be ′t1′ and the time taken by body to cover rest of the distance be ′y2′

5 Kmph =  (x/3)/ $t_{1}$

20Kmph=  (2x/3)/ $t_{2}$

 ⇒  $t_{1}$ = x/15  hours,  $t_{2}$ =  x/30  hours

Average velocity =  Total displacement/Total time taken

=  x/$t_{1}$ + $t_{2}$

= 10Kmph Ans.

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