Question

" an object covers half of its distance at the rate of X km/hr
and next hall at the rate of y km/hr prove that its average
speed is equal to 2xy by x + y km/hr​

Answer 1

Answer:

given an object covers half of its distance at x kmph

half of its distance in ykmph

Explanation:

average speed =(total displacement)/total time taken

let s be the total distance

1. s/2=xt1. s/2x=t1
2. s/2=yt2. s/2y=t2
3. total time=t1+t2=s(x+y)/2xy
4. so average speed=2xy/x+y