Average speed = total distance divided by total time.
In the first part, the car covered 490 km in 7 hours, but I think you mistyped the second part (“then covers a speed of 90km”) and a critical piece is missing to find the total distance and time.
Sin= p/h , cos= b/h , tan= p/b
I believe that the answer youre looking for should be about 2.84/4
You will wait 210 days. Hope this helps!
