Question

Ajay Travels 30km daily to his office by car. while going one day, he covers 10km at a uniform speed of 30km/h and the rest 20km at a uniform speed of 40km/h. what is the average speed of his car?​

Answer 1

Answer:

70 km/hr will be its average speed

Explanation:

Because he travels 10 km with the speed of 30km/hr and 20 km with the speed of 40 km/hr

Answer 2

Answer:

1)Distance=10km

 Speed=30km/hr

  Time=$\frac{10}{30}$=0.3hr

2)Distance=20km

Speed=40km/hr

Time=$\frac{20}{40}$=0.5hr

Average Speed Of His Car=$\frac{20+10}{0.3+0.5}$

                                            =$\frac{30}{0.8}$

                                            =$\frac{30X10}{8}$

                                            =$\frac{300}{8}$

                                            =37.5km/hr

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Explanation: