A woman on vacation travels first 150 km at 60 km/hr and the next 150 km at 25 km/hr. The average speed for the first 200 km of the tour is:
Answer & explanation
Correct answer: option 1
Distance = Speed × Time
Time (to travel first 150 km) = \(\frac{150}{60}\) = \(\frac{5}{2}\)
Time (to travel next 50 km) = \(\frac{50}{25}\) = 2
Total time taken to travel 200km = \(\frac{5}{2}\) + 2 = \(\frac{9}{2}\)
Average speed = \(\frac{200}{\frac{9}{2}}\) = \(\frac{400}{9}\) = 44.44 km/hr