Question

A truck travels some distance with the constant speed of 30 km/h and returns back with thevconstant speed of 40 km/h . Caculate the average speed of the truck .

Answer 1

For 1st ,
Let distance travelled be x
Given,
Speed=30km/hr
Time=distance÷speed
Time=x÷30


For 2nd,
Distance will be the same
That is
Distance=x
Speed=40km/hr
Time=x÷40

We know that,
Average speed=total distance÷total time
Avera

Answer 2

Answer:

Explanation:

It has given that speed = 30 km / hr & 40 km / hr

Average speed= total distance / total time taken

=2 × 30 × 40 / 30 + 40

=2400/70

= 34.28 km / hr answer...