Abhi finishes a journey by car in 9 hours. He travels the first half of the journey at a speed of 40 km/h and the second half of the journey at a speed of 50 km/h. The total distance covered is:
Answer & explanation
Correct answer: option 3
Average Speed = \(\frac{2 × S1 ×S2 }{S1 + S2}\)
= \(\frac{2 × 50 × 40 }{50 + 40}\)
= \(\frac{400 }{9}\)
Distance = Speed × Time
= \(\frac{400 }{9}\) × 9
= 400 km