Answer :
Answer:
Let's find the speed Ejat needs to maintain for the next 120 km to achieve an average speed of 60 km/h for the entire journey.
Total time taken to cover 90 km at 30 km/h = distance / speed = 90 km / 30 km/h = 3 hours
Let the speed for the next 120 km be x km/h.
Total time taken for the entire journey = (90 km / 30 km/h) + (120 km / x km/h)
Average speed = total distance / total time
60 km/h = (90 km + 120 km) / (3 hours + (120 km / x km/h))
Simplifying the equation and solving for x, we get x = 90 km/h.
Therefore, Ejat needs to maintain a speed of 90 km/h for the next 120 km to achieve an average speed of 60 km/h for the entire journey.
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