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CBSE Class 9 Answered

SIR ANSWER THIS PLEASE
Asked by amma95 | 14 Sep, 2009, 01:06: PM
answered-by-expert Expert Answer

The time taken by Satya to finish the race = (900 m) / (2 m/s) = 450 s

The time taken by Albert to finish the race be t, then

s = ut + at2/2

900 = t + t2/450

900x450 = 450t + t2

 t2  + 450t - 900x450 =  0

t = [-450 ± (4502 + 4x450x900)]/2

t = [-450 ± (4502 + 4x450x900)]/2 

t = 450 s.

Both will finish the race simultaneously.

Regards,

Team,

TopperLearning.

 

 

Answered by | 14 Sep, 2009, 06:30: PM

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