Question : A bus travels 166 km in 3 hours and then travels the next 2 hours at 134 km/hr. Find the average speed of the bus.
Option 1: 50.4 km/hr
Option 2: 86.8 km/hr
Option 3: 43.8 km/hr
Option 4: 59.4 km/hr
Correct Answer: 86.8 km/hr
Solution :
The total distance travelled by the bus = 166 km + (134 km/hr × 2 hours) = 166 km + 268 km = 434 km
The total time taken by the bus = 3 + 2 = 5 hours
The average speed of the bus $=\frac{\text{Total distance}}{\text{Total time}}=\frac{434}{5 }= 86.8$ km/hr
Hence, the correct answer is 86.8 km/hr.
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