GRE
Exam
Numerical Ability
Area and Volume
A rectangular parking lot 2x feet long and x feet wide is to be enlarged so that the lot will be 2 times as long and 3 times as wide as it is now. The area of the enlarged rectangular lot will be how many times the area of the present lot?
(A) 6
(B) 5
(C) 4
(D) 3
(E) 2
Read Solution (Total 3)
-
- length=2x
width=x
area of present lot=2x*x=2x^2
new length=2*2x=4x
new width=3*x=3x
area of enlarged lot=4x*3x=12x^2=6*(2x^2)
area of enlaged lot=6*area of present lot
So, (A)6.......ans - 10 years agoHelpfull: Yes(6) No(0)
- 6 times will be d ans..
- 10 years agoHelpfull: Yes(2) No(0)
- The original rectangle has area A1=2x*x
The new rectangle has area A2=(2*2x)*(3*x)=12x^2
ratio=A1/A2=1/4
- 10 years agoHelpfull: Yes(0) No(4)
GRE Other Question
The water level in a tank is lowered by 6 inches, then raised by 8 1/2 inches, and then lowered by 4 inches. If the water level was x inches before the changes in level, which of the following represents the water level, in inches, after the changes?
option
(A) x - 1 1/2
(B) x + 1 1/2
(C) x - 6 1/2
(D) x + 6 1/2
(E) x - 18 1/2
A certain jar contains 100 jelly beans: 50 white, 30 green, 10 yellow, 5 red, 4 purple, and 1 black. If a jelly bean is to be chosen at random, what is the probability that the jelly bean will be neither purple nor red?
(A) 0.09
(B) 0.11
(C) 0.55
(D) 0.91
(E) 0.96