Question

A car travel's at a rate of 30 km/h for 5 hrs and then 40 km/h for 10 hrs. Then average speed of car is​

Answer 1

Explanation:

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

Answer 2

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