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a car covers a distance of 490 km with a speed of 70km and then covers a speed of 90km calculate its average speed

Sagot :

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.