Question

A car cover 30 kilometre in 30 minute and the next 30 kilometre in 40 minutes calculate the average speed for the entire journey

Answer 1

≡QUESTION≡

A car cover 30 kilometers in 30 minute and the next 30 kilometers in 40 minutes, calculate the average speed for the entire journey.

                                                         

║⊕ANSWER⊕║

Average speed = total distance/ total time

30 min = 30/60 hr

             = 1/2 hr

40 min = 40/60 hr

            = 2/3 hr

Total time = 1/2+2/3

                  = 7/6 hr

Total distance = 30 km+ 30 km

                        = 60 km

Average speed = Total Distance / Time

                          = 51.42 km/hr

                                                         

Answer 2

Answer:

Average Speed = 51.43 m/s

Explanation:

We Have :-

A car cover 30 kilometer in 30 minute and the next 30 kilometer in 40 minutes

To Find :-

Average Speed

Formula Used :-

Average Speed = Total Distance / Total Time

Solution :-

First half

Distance = 30 km

Time = 30 min = 1/2 hour

Second Half

Distance = 30 km

Time = 40 min = 2/3 hour

Total Distance = 60 km

Total Time = 7/6 hour

Average Speed = 60 * 6 / 7

                          = 51.43 m/s

Average Speed = 51.43 m/s