Question

a truck travel some distance with constant speed of 30km/h and returns back with the constant speed of 40km/h. calculate the average speed of the entire journey

Answer 1

HEYA!
--------

-----------------------------------------------------------------------------------------------------
✳AVERAGE SPEED ✳
-----------------------------------------------------------------------------------------------------

$= > \frac{30 + 40}{2} \\ \\ = > \frac{70}{2} \\ \\ = > 35 \\ \\ \\ = > > hence \: the \: average \: speed \: is \: 35kmh {}^{ - 1}$
-----------------------------------------------------------------------------------------------------
---------------------------------------------------☺