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An aeroplane flies 200 km with a uniform speed of 300 km/h and then another 200 km with a uniform speed of 200 km/h. Calculate the average speed of the aeroplane.


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Answer 1

Answer:

Average Speed = 240 km/hr

Step-by-step explanation:

Average Speed = Total Distance/ Total Time

Total distance = 200 + 200 = 400

time for the first time = T = d/S

                                           = 200/300 = 2/3 hr

time for the second time = 200/200 = 1 hr

Total time = 2/3 + 1

                 = 5/3 hrs

Average Speed = (400 * 3)/5

                           = 240 km/hr

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Answer 2

➡️ ANSWER

☆ Given,

● Distance 200 km with a uniform speed of 300km/h.

● Another distance 200 km with a uniform speed of 200km/h.

☆ To Find?

■ Average Speed.

◇ Solution:-

We know that,

$average \: speed = \frac{total \: distance}{total \: time}$

Total Distance = 200km +200km = 400km

Time = ?

We know that,

$time = \frac{distance}{speed}$

Time taken for the 1st 200 km =

$\frac{200km}{300km /h} = \frac{2}{3}hour$

Time taken for the another 200 km =

$\frac{200km}{200km /h} = 1hour$

Total time =

$\frac{2}{3} + 1 = \frac{2 + 3}{3} = \frac{5}{3} hours$

$avg \: speed = \frac{400}{ \frac{5}{3} } = \frac{400 \times 3}{5} = \frac{1200}{5} = 240km /hr$