Question

A car travels 80 km from point A to B in 1 h, then 40 km from point B to C in 0.4 h. What is the average speed of the car? Give the answer in m/s.


Pls answer fast

Answer 1

Let the each half of the running time be t.
During first half time, speed of car is 80 km/h
Distance covered d
1
​
=80t km
During second half time, speed of car is 40 km/h
Distance covered d
2
​
=40t km
Total distance covered d=d
1
​
+d
2
​
=80t+40t=120t
Total time taken T=2t
Average speed v
avg
​
=
T
d
​
=
2t
120t
​
=60 km/hr
Option C is correct.

Answer 2

60 km hope it helps mark me as a brain list