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Re: Alex and Brenda both stand at point X. Alex begins to walk away from B [#permalink]
1
Let t be time it will take that to happen


Rt = 2(4t + 4)

Rt - 8t = 8

t(R-8) = 8

t= 8 /R-8

Time Alex would have been walking

8/R-8 + 1

= R/R-8

Answer C

Adewale Fasipe, Lagos Nigeria.
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Re: Alex and Brenda both stand at point X. Alex begins to walk away from B [#permalink]
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