A jeep travels to a place 300 km away at an average speed of 60 km/h and returns at a speed of 30 km/h. What is the average speed (in km/h) for the whole journey?
Answer & explanation
Correct answer: option 3
Formula used :- Speed = \(\frac{Distance}{Time}\)
Time taken by jeep to travel 300km = \(\frac{300}{60}\) = 5hour
Time taken by jeep to travel 300km while returning = \(\frac{300}{30}\) = 10hour
Average speed = \(\frac{Total\;Distance}{Total\;Time}\)
= \(\frac{300 + 300 }{10 + 5 }\)
= \(\frac{600}{15}\)
= 40 km/h