Question

A car covers the first half of the distance between 2points at a speed of 60km/h and second half at a speed of 80km/h calculate the average speed of the car

Answer 1

Explanation:

average speed = total distance travelled /total time taken

=80+60km/1+1hour

=140km/2hour

therefore = 70km/hour

Answer 2

Answer:

68.57km/hr

Explanation:

average speed when distance is same is

• (2xy)/(X+y) (#X& Y are speeds)
• (2*60*80)/(60+80)
• (2*60*80)/(140)
• 480/7
• 68.57km/hr