Prashad goes 96 kilometres on a bike at a speed of 16 km/h, 124 kilometres at 31 km/h in a car, and 105 kilometres at 7 km/h in a horse cart. Find his average speed for the entire distance travelled.
Answer & explanation
Correct answer: option 2
Distance = Speed × Time
Time 1 = \(\frac{96}{16}\) = 6 hour
Time 2 = \(\frac{124}{31}\) = 4 hour
Time 4 = \(\frac{105}{7}\) = 15 hour
Average Speed = \(\frac{105 + 96 + 124 }{6 + 4 + 15 }\)
= \(\frac{325}{25}\) = 13 km/h