Vector Problem: Clarity on Part (f) & Why 2.15 Only

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chwala
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Homework Statement
kindly see attached problem
Relevant Equations
vectors
1619311735493.png

1619311779300.png
i need clarity on part (f) only...we have two values for ##t## i.e ## t=2.79## and ##t=2.15##, ...the mark scheme says solution is:

1619311920632.png


why ##2.15## only, i have tried substituting the two values back into the problem and they both satisfy part ##e##
 

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I need help on part ##f## only.
 
FactChecker said:
Which of the two time values that you got is first?
ok i see quite tricky...thanks mate. :cool:
 

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