A vehicle is driven at 50km/h for 2 and half hours and then at 65km/h for 1/2 hours find the average speed for the whole journey
distance at 2.5 hrs = 2.5(50) = 125 km
distance at .5 hrs = .5(65) = 32.5 km
avg speed = 157.5 km/3 hrs
= 52.5 km/h
thanks
To find the average speed for the whole journey, you need to calculate the total distance traveled and the total time taken.
First, let's calculate the distance traveled during each part of the journey.
Distance traveled in the first part = Speed × Time = 50 km/h × 2.5 hours = 125 km
Distance traveled in the second part = Speed × Time = 65 km/h × 0.5 hours = 32.5 km
Next, let's calculate the total distance traveled.
Total distance traveled = Distance of first part + Distance of second part = 125 km + 32.5 km = 157.5 km
Now, let's calculate the total time taken.
Total time taken = Time of first part + Time of second part = 2.5 hours + 0.5 hours = 3 hours
Finally, we can calculate the average speed.
Average speed = Total distance traveled ÷ Total time taken = 157.5 km ÷ 3 hours ≈ 52.5 km/h
Therefore, the average speed for the whole journey is approximately 52.5 km/h.