Question

A car moves with a speed of 30 km/ h-1 gor half an hour , 25 km/h-1 for one hour and 40 km /h-1 for two hours. Calculate the Average speed of the car

Answer 1

Answer:The average speed of the car is approximately 34.29 km/h.

Explanation:

Distance = Speed*Time

$AverageSpeed=\frac{Total Distance}{Total Time}$

$AverageSpeed=\frac{(30*0.5)+(25*1)+(40*2)}{0.5+1+2}$

$AverageSpeed=\frac{15+25+80}{0.5+1+2}$

$AverageSpeed=\frac{120}{3.5}$

$AverageSpeed=34.285$

$AverageSpeed=34.29km/h(approx.)$