| 1. |
A boy rides his bicycle 10 km at an average speed of 12 km/hr and again travels 12 km at an average speed of 10 km/hr. His average speed for the entire trip is approximately : |
|||||||
Answer: Option B Explanation: Total distance travelled = (10 + 12) km/hr = 22 km/hr Total time taken = (10/12 + 12/10) hrs = 61/30 hrs. ∴ Average speed = (22 x 30/61) km/hr = 10.8 km/hr |
Post your comments here:
Name *:
Email : (optional)
Your comments will be displayed only after manual approval.