Question

4) A car travels first 30 km in 1 hour and next 40 km in 2 hours. Calculate the average speed of the car.

Answer 1

Answer:

The question can be interpreted as

Total Distance =40 km, of which 30 km covered in first hour, remaining 10 km covered in another hour

Av speed= 40/2= 20 km/hr

Or

2. Total distance= 40 km, 30 km in 1 hr, remaining 10 km in 2 hrs

Av speed = 40/3= 13.33333.. km/hr

Or

3. Total distance= 70 km, 30 km in first hr, 40 km in second hr

Av speed= 70/3= 23.3333.. km/hr

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Answer 2

Explanation:

speed of car in first time equal to 30 km per hour

speed of card in second time = 40 km into = 20 km per hour

average speed of car equals 50 km per hour divided / 2

= 25 km per hour

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