GRE Exam Numerical Ability Time Distance and Speed

Roger and Robin live 190 miles apart. They both drive in a straight line toward each other to meet for lunch. If Roger drives at 50 mph and Robin drives at 70 mph, then how many miles apart will they be exactly 45 minutes before they meet?

Read Solution (Total 1)

Distance = Speed*Time = ((50*70)/(70-50)) * (45/60) = 21.87 miles.
Since they are moving towards each other, the speed of each of them should be added.
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GRE Other Question

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