Question

Q3
A car travels first 240 kms of a journey at a speed of 48 kmph and the remaining 660 kms at a speed of 60 kmph. Find the average speed (approximate) of the
whole journey?​

Answer 1

Answer:

56.25 kmph                      56kmph(approx)

Step-by-step explanation:

Average speed =Total Distance Travelled/Total Time Taken

Time taken=Distance/Speed

For the first journey time taken =240/48

                                                            =5hrs

For the next journey time taken =660/60

                                                      =11 hrs

Total Time taken=5+11=16 hrs

Total Distance Travelled=240+660=900km

Average speed=900/16

                           =56.25 kmph

                           =56kmph(approx)

Answer 2

The average speed is 56.3 km/hr.

Given - Distance and time

To find - Average speed

Solution - Average speed is calculated by the formula -

Average speed = total distance travelled/time taken

Total distance travelled = 240 + 660

Performing addition

Total distance travelled = 900 km

Time taken to cover 240 km = distance/speed

Time = $\frac{240}{48}$

Time = 5 hours

Time taken to cover remaining journey = $\frac{660}{60}$

Time = 11 hours

Total time taken = 11 + 5

Total time taken = 16 hours

Keep the values in formula

Average speed = $\frac{900}{16}$

Average speed = 56.3 km/hr

Hence, the average speed is 56.3 km/hr.

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