Question

A car travels 80km in 8 hours. Find the speed of the car.​

Answer 1

Answer:

$speed \: = \frac{distance}{time}$

$speed \: = \frac{80 }{8}$

$speed \: = 10 \: m \:per sec$

Answer 2

Answer:

60 km/hr

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

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