Question

A man travels a distance of 24 km at 6 kmph another distance of 24 km at 8 kmph and a third distance of 24 km at 12 kmph.his average speed for the whole journey ( in kmph) is

Answer 1

Answer:

His average speed is 8 km/h.

Step-by-step explanation:

Average speed = Total distance travelled÷ Total time taken to travel

Total distance = (24 + 24 + 24) = 72km

Total time taken = (4 + 3 + 2) = 9 hrs

Now, Average speed = 72/9 = 8km/h

Answer 2

The average speed is 8 km per hour.

Step-by-step explanation:

Consider the provided information.

As we know: $Time=\frac{Distance}{Speed}$

First calculate the time taken.

A man travels a distance of 24 km at 6 kmph.

$T_1=\dfrac{24}{6}=4$

Another distance of 24 km at 8 kmph

$T_2=\dfrac{24}{8}=3$

Third distance of 24 km at 12 kmph.

$T_3=\dfrac{24}{12}=2$

Total time taken is 4+3+2=9

Total distance is 24+24+24=72

The formula to calculate average speed is: $\text{Average speed}= \frac{\text{Total distance}}{\text{Elapsed Time}}$

$\text{Average speed}= \frac{72}{9}=8$

Hence, the average speed is 8 km per hour.

#Learn more

What is the formula to calculate average speed

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