Question

a man covers first 100 km of journey at 50 km / hr next 120 km at 54 km / hr and last 30 km at 60 km / hr find his average speed during the whole journey Please Please tell the answer
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Answer 1

According to given in the question:

First 100 km journey at 50 km/h.

So, Time taken = $\frac{distance}{speed}$ = $\frac{100}{50}$ = 2 hour.

Second, 120 km at 54 km/h.

So, Time taken = $\frac{distance}{speed}$ = $\frac{120}{54}$ = 2.22 hour.

Third, 30 km at 60 km/h.

So, Time taken = $\frac{distance}{speed}$ = $\frac{30}{60}$ = 0.5 hour.

Now, Average speed = $\frac{distance}{time}$ = $\frac{100+120+30}{2+2.22+0.5}$ = $\frac{250}{4.72}$ = 52.9 km/h

Answer 2

Step-by-step explanation:

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