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Re: Albert was driving on a straight highway [#permalink]
Attachment:
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Let the speed of Beatrice = x mph

Let Beatrice passed Albert at point C.
Beatrice took 2 hours to reach from C to D

We can write

For Beatrice,
CB = x * 2
For Albert,
CB = 60*(2+50/60) =60*(2+ 5/6) = 60*17/6

Solving

CB = 170
Here
x*2 = 170

Solving
x = 85

Answer: 85
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Re: Albert was driving on a straight highway [#permalink]
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