Ask Question
18 March, 20:23

John runs for 10 mins at a uniform speed 9kn/h. At what speed should he run for the next 20mins so that theaverage speed comes to 12km/h.

+3
Answers (1)
  1. 18 March, 21:25
    0
    13.5 km/h

    Explanation:

    John runs for 10 min at 9 km/h, then 20 min at v. He will have run a total of 30 min at 12 km/h.

    Therefore:

    (30 min) (12 km/h) = (10 min) (9 km/h) + (20 min) v

    v = 13.5 km/h
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “John runs for 10 mins at a uniform speed 9kn/h. At what speed should he run for the next 20mins so that theaverage speed comes to 12km/h. ...” in 📘 Physics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers