Question

12. A car travels a certain distance from town A to B at the speed of 42 km/h and from town B to A at a speed of 48 km/h. What is the average speed of the car? ​

Answer 1

Answer:

If two equal distances are covered at different speeds

at A km/h and B km/h respectively, then

Average speed during the whole journey

= 2ABA+Bkm/h

Therefore, Average speed of the car

= 2×42×4842+48=2×42×4890=44.8km/h

Step-by-step explanation:

If two equal distances are covered at different speeds

at A km/h and B km/h respectively, then

Average speed during the whole journey

= 2ABA+Bkm/h

Therefore, Average speed of the car

= 2×42×4842+48=2×42×4890=44.8km/h