you have boasted to your friends that you can ride your bicycle at 30 KPH (KM per Hour) over a 30KM race track comprising of two 15km laps. However, when you finish the first lap, your coach tells you that your average is only 15 KPH. How fast must you ride to bring your average speed to 30 kph.

faster than 100 kph

Explanation:

Time taken to complete the first lap is

If the person's average speed is to be 30 kph then the complete race would be over in

But 1 hour has passed in the first lap already so, the next 15 km must be covered in 0 time.

So, the speed of the bike must be more than 100 kph.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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