GRE Math : How to find the length of an edge of a prism

Study concepts, example questions & explanations for GRE Math

varsity tutors app store varsity tutors android store varsity tutors amazon store varsity tutors ibooks store

Example Questions

Example Question #11 : Solid Geometry

The surface area of a rectangular prism is , and the lengths of two sides are  and . What is the volume of the prism?

Possible Answers:

Correct answer:


The surface area of a rectangular prism with sides , and  is given as:

Two sides are known; it does not matter how they are designated, but for this problem let  and , with  as the unknown side. This yields equality:

Now that the three dimensions are known, it's possible to calculate the volume:

Tired of practice problems?

Try live online GRE prep today.

1-on-1 Tutoring
Live Online Class
1-on-1 + Class
Learning Tools by Varsity Tutors