Question

If 3 Square feet of fabric costs $3.75,what would 7 Square feet cost?
(8th grade problem)

Answer 1

Answer:

$8.75

Step-by-step explanation:

(This type of problem solving is called the UNITARY Method i.e. first, we find the value in terms of unit(one) and then later in terms of the quantity we wish to find)

3 sq. ft. costs $3.75

Then, 1 sq. ft. will cost $3.75/3

Therfore, 7 sq. ft. will cost $(3.75×7)/3

= $8.75