Question

A car making a 106-km journey travels 39 km/h for the first 53 km. How fast must it go during the second 53 km to average 47 km/h?

Step 1

Find the speed for the next 53 km journey.

**Given information: **

Total distance travelled is 106 km.

The speed of the car for the first 53 km of the journey is 39 km/h.

The average speed of the car is 47 km/h.

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