Question

ACar travel with uniform speed is 40km/h an next 30km at uniform rate and 20km/h. find the average speed of car

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Answer 1

Answer:

A car travels 30 km at the uniform speed of 40 km/h and the next 30 km at a uniform speed of 20 km/h. Find its average speed. Answer : 26.67 km/hrs

Answer 2

$\Huge{\color{magenta}{\underline{\underline{Solution:-}}}}$

$\begin{gathered}t=\frac{d_1}{v_1}+\frac{d_2}{v_2} \\ \to\frac{30}{40}+\frac{30}{20}\\ \to 2.25 hours \end{gathered}$

$\begin{gathered} v_{avg}=\dfrac{d_1+d_2}{t} \\ \to \frac{30+30}{2.25}\\ 22.67km/hr \end{gathered}$

Thus, the average speed of the car is 26.67km/h.