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.
6 years agoHelpfull: Yes(0) No(0)

GRE Other Question

Nguyen had invested a total of $20,000 in two banks A and B. At the end of one year he realized that his interest amount from bank A was one and half times that from bank B. If his investment in bank A was three times as that in bank B and if he earned a total interest amount of $1,250 from the two banks then what is the interest rate in bank B ?
[A] 10% [B] 8 [C] 12% [D] 5% Reservoir A contains 450 million gallons of water more than does Reservoir B. If 100 million gallons of water were to be drained from Reservoir A into Reservoir B, then Reservoir A would contain twice as much water as would Reservoir B. How many million gallons of water does Reservoir A currently contain?