GRE Exam Numerical Ability Pipes and Cistern

14. A 1,500-gallon tank contains 200 gallons of water. Water begins to run into the tank at the rate of 75 gallons per hour. When will the tank be full but not overflowing?
a. 7 hours, 8 minutes
b. 17 hours, 20 minutes
c. 20 hours
d. 22 hours, 40 minutes

Read Solution (Total 3)

GRE Other Question

12. Write an equation of the line that passes through the pair of points.

(-5, -2), (3, -1)
18. Write an equation of the line that is perpendicular to and goes through (-4, 5).
a.
b.
c.
d.