Question

5. If a person travels two equal distances at 20kmph
and 30kmph respectively, what is his average speed?
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Answer 1

Answer:

24 is your answer mate hope you understand

Answer 2

$\Large{\underbrace{\sf{\purple{Required\:Answer:}}}}$

Let us assume that :-

• The distance travelled be D km.

As, we know the formula of getting Average speed.Let's put the question's value!

$:\implies\sf\orange{ Speed_{Avg}=\dfrac{Total\:Distance}{Total \: Time}}\\\\\\\implies\sf Speed_{Avg}=\dfrac{D+D}{t_1+t_2}\\\\\\\implies\sf Speed_{Avg}=\dfrac{2D}{\frac{D}{20}+\frac{D}{30}}\\\\\\\implies\sf Speed_{Avg}=\dfrac{2D}{\frac{3D+2D}{60}}\\\\\\\implies\sf Speed_{Avg}=\dfrac{2D}{\frac{5D}{60}}\\\\\\\implies\sf Speed_{Avg}=2\times 12\\\\\\\implies\underline{\boxed{\sf\orange {Speed_{Avg}=24\: km/h}}}$

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$\therefore\:\underline{\textsf{Average Speed will be \textbf{24 km/h}}}.$