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Pinku

· started a discussion

· 1 Months ago

how to calculate time? (Question:590984.0)

how to calculate the total time?

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

Solution:

Ans.(a)


(Hexagonal path has six sides) 

first 20 meters he goes with a speed of 20 m/s than time = 1 second

next 20 meters with a speed of 10 m/s than time = 2 second 

Similarly he continues for the rest of the hexagonal path with the same alternating speeds

\(\therefore\) Total time = 1+2+1+2+1+2 = 9 second


\(Average speed = \cfrac{Total \ distance }{Total \ time}\)

\(Avg. speed= \cfrac{6\times20}{9}\) = 13.33 m/sec


Knowledge Expert

· commented

· 1 Months ago

Dear student,
We have update the solution .Please check now, keep learning with us.

Regards
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