Mathematics · Speed, Time and Distance
A person walks along the boundary of a rectangular field whose dimensions are 6 km long and 3 km wide. For the first 1 hour, he walks at a speed of 2 km/hr. For the next 1 hour, he increases his speed to 4 km/hr. For the next 1 hour, his speed is decreased to 2 km/hr. For the fourth 1 hour, he again increases his speed to 4 km/hr. Find his average speed (in km/hr) during these 4 hours.
- 12
- 23✓
- 34
- 45
Correct answer
3
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