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(p) Lee completes a journey in three
stages. In stage 1, he drives at 30 km/h
for 45 minutes. In stage 2, he drives at 50
km/h for 2 hours 48 minutes. Altogether,
over all three stages, he drives 200 km in
4 hours. What is Lee's average speed in
stage 3 of his journey?



Answer :

Lee's average speed in stage 3 of his journey is 83.33 km/h.

What is an average speed?

The overall distance the object covers in a given amount of time is its average speed. A scalar value represents the average speed. It has no direction and is indicated by the magnitude.

Here, we have

Lee travels in stage 1 of his journey is

d = s × t

d = 30 × 3/4

d = 22.5km

Lee travels in stage 2 of his journey is

d = s × t

d = 50 ×2(48/60)

d = 140km

The average speed in stage 3 is

d = 200 - 140 - 22.5 = 37.5km

t = 4hr - 2hr48m - 45m = 27 min

s = 37.5 ÷ 0.45 = 83.33 km/h

Hence, Lee's average speed in stage 3 of his journey is 83.33 km/h.

To learn more about the average speed from the given link

https://brainly.com/question/24739297

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