A car travels a distance of 75 , km at the sp | vedclass

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Question

(A) The average speed is defined as the total distance traveled divided by the total time taken.Total distance = $75 \, km + 25 \, km + 50 \, km = 150

Vedclass · Accepted Answer

$15$

Vedclass · Answer

(A) The average speed is defined as the total distance traveled divided by the total time taken.Total distance = $75 \, km + 25 \, km + 50 \, km = 150 \, km$.Time taken for the first part = $\frac{75 \, km}{25 \, km/h} = 3 \, h$.Time taken for the second part = $\frac{25 \, km}{5 \, km/h} = 5 \, h$.Time taken for the third part = $\frac{50 \, km}{25 \, km/h} = 2 \, h$.Total time = $3 \, h + 5 \, h + 2 \, h = 10 \, h$.Average speed = $\frac{	ext{Total distance}}{	ext{Total time}} = \frac{150 \, km}{10 \, h} = 15 \, km/h$.

$A$ car travels a distance of $75 \, km$ at the speed of $25 \, km/h$. It covers the next $25 \, km$ of its journey at the speed of $5 \, km/h$ and the last $50 \, km$ of its journey at the speed of $25 \, km/h$. What is the average speed of the car? (in $km/h$)

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