ISEE Upper Level Quantitative : How to find the surface area of a prism

Study concepts, example questions & explanations for ISEE Upper Level Quantitative

varsity tutors app store varsity tutors android store

Example Questions

Example Question #1 : How To Find The Surface Area Of A Prism

 is a positive number. Which is the greater quantity?

(A) The surface area of a rectangular prism with length , width , and height 

(B) The surface area of a rectangular prism with length , width , and height .

Possible Answers:

(B) is greater

(A) and (B) are equal 

(A) is greater

It is impossible to determine which is greater from the information given

Correct answer:

(A) is greater

Explanation:

The surface area of a rectangular prism can be determined using the formula:

Using substitutions, the surface areas of the prisms can be found as follows:

The prism in (A):

 

 

Regardless of the value of ,  - that is, the first prism has the greater surface area. (A) is greater.

Learning Tools by Varsity Tutors

Incompatible Browser

Please upgrade or download one of the following browsers to use Instant Tutoring: