Question

A car moves through 20 km at a speed of 40 km/h,
and the next 20 km at a speed of 60 km/h. Calculate
its average speed.
​

Answer 1

Answer:48

Explanation:

Avg speed =tot distance/tot time taken therefor

Avg speed =20+20/tot time

For 1st 20km,t=dist/speed

. =20/40=1/2

For thenext 20 km,t=20/60

. =1/3

Therefor avg speed =40*6/5=48

NB:plz do the conversions if necessary