The first half of total distance of 50 km is covered in 2 h, and the second half in 3 h. The average speed is ______.
2.78 ms^ (-1)
7 ms^ (-1)
13.8 ms^ (-1)
5.56 ms^ (-1)
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Answer:
Given :- The first half of total distance of 50 km is covered in 2 h,
and the second half in 3 h.
To find :-The average speed is ______.
Step-by-step explanation:
25km covered in 2 hour
25 km covered in 3hour
average :- total distance /total time
= 25+25/2+3 = 50/5 = 10 km / hour
in meter /second = 50000/60*60
= 13.8 ms^(-1) Are correct ✅ option
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