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A car travels first 30 km with a uniform...

A car travels first 30 km with a uniform speed of 60 km `h^(-1)` and then next 30 km with a uniform speed of 40 km `h^(-1)`. Calculate : (i) the total time of journey, (ii) the average speed of the car.

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To solve the problem, we will break it down into two parts: calculating the total time of the journey and then calculating the average speed of the car. ### Step 1: Calculate the time taken for the first part of the journey (A to B) 1. **Distance from A to B** = 30 km 2. **Speed from A to B** = 60 km/h 3. **Time taken (t1)** = Distance / Speed = 30 km / 60 km/h = 0.5 hours ### Step 2: Calculate the time taken for the second part of the journey (B to C) ...
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