linear equation

Asked by Sanjula | 13th Jun, 2009, 03:26: PM

Expert Answer:

As per data in question:

A beets B by 20 m. Hence x/va =(x-20)/vb ...(1)

B beats C by 10 m. Hence x/vb=(x-10)/vc ...(2)

A beats C by 28 m. Hencex/va = (x-28)/vc ...(3)

multplying (1) and (2) and dividing by (3):

x=(x-20)(x-10)/(x-28)

x2-28x=x2-30x+200
2x-200=0

x=100 m

 

 

 

 

Answered by  | 13th Jun, 2009, 05:30: PM

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