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Sai Anusha

· started a discussion

· 1 Months ago

Doubt (Question: 99417.0 )

Why is it divided with 9?

Question:

An artist in a circus moves along the hexagonal path of each side 20 meters in such a way that for the first 20 meters he goes with a speed of 20 m/s and the next 20 meters with a speed of 10 m/s. Similarly he continues for the rest of the hexagonal path with the same alternating speeds i. e., 20 m/s and 10 m/s. The average speed of the artist per round of the circus is:

Options:
A) 13.33 m/s
B) 23.66 m/s            
C) \(39\cfrac{1}{3}\) m/s 
D)

15 m/s

E) None of these
Solution:

Average speed = Total distance/Total time 


(Hexagonal path has six sides) 

= \(\frac{6\times20}{9}\)= 13.33m/s

Govindaraj Vilvasekaran

· commented

· 1 Months ago

Total Time = (20/20 + 20/10)*3

navdeep

· commented

· 1 Months ago

Yet to be approved!

kanhaiya jha

· commented

· 1 Months ago

Its total time means in 9 minute(2+1+2+1+2+1=9) he will cover one round...
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