Question

A body covers half the distance with a speed of 20 m/s and the other half with 30 m/s. The average speed of the body during the whole journey is :

Answer 1

Answer:

hey mate

Explanation:

refer to the attachment peez

Answer 2

pls refer the attachment first for better understanding

t1=s 1/V1= s/2×20=s/40

t 2=s2/V2= s/2×30=s/60

$avg \: speed = \frac{total distance}{total \: time}$

$avg \: speed = \frac{s}{ s(\frac{1}{40} + \frac{1}{60} ) } \\ avg \: speed = \frac{1}{ \frac{5}{120} } \\ avg \: speed = \frac{120}{5} = 24 \frac{m}{s}$

i hope this helps ( ╹▽╹ )