Question

car travels first 30 km with a uniform speed of 30 km h-1 for 30 minute and then at a uniform speed of 60 km h-1 for next 30 minute calculate the average speed of car

Answer 1

Answer:

1/2 is the average speed formula of average speed (total distance travelled/ total time taken)

Answer 2

$</p><p>.</p><p></p><p>Total distance covered by car = 60 km</p><p>And, total time taken in journey t=t </p><p>1</p><p> </p><p> +t </p><p>2</p><p> </p><p> </p><p>t= </p><p>v </p><p>1</p><p> </p><p> </p><p>s </p><p>1</p><p> </p><p> </p><p> </p><p> + </p><p>v </p><p>2</p><p> </p><p> </p><p>s </p><p>2</p><p> </p><p> </p><p> </p><p> </p><p></p><p> = </p><p>60</p><p>30</p><p> </p><p> + </p><p>40</p><p>30</p><p> </p><p> </p><p></p><p> = </p><p>4</p><p>5</p><p> </p><p> h</p><p></p><p>Therefore, Average Speed= </p><p>Total Time</p><p>Total Distance</p><p> </p><p> = </p><p>4</p><p>5</p><p> </p><p> h</p><p>60km</p><p> </p><p> =48 km/h$

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