Question

11. A car travels 30 km at a uniform speed of 40 km/hr and the next 30 km at a uniform speed of 20 km/hr. Find its average speed.

Answer 1

The average speed of the car can be calculated using the formula: average speed = total distance / total time.

Let's call the time taken to travel the first 30 km t1 and the time taken to travel the next 30 km t2. We know that:

t1 = 30 / 40 = 0.75 hours

t2 = 30 / 20 = 1.5 hours

The total distance is 60 km and the total time taken is t1 + t2 = 0.75 + 1.5 = 2.25 hours.

So the average speed is 60 / 2.25 = 26.67 km/hr.

Step-by-step explanation:

Answer 2

The average speed of the car is 26.66kmh−1.

Step-by-step explanation:

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