It is 10 Because (2+3)•2 is 10 this is how. First you start with the numbers in parentheses so (2+3) that equals 5 and then you multiply that by 2 and 5•2=10 which is your answer.
The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unitvalue
Given:
height of 1 crate = 3 feet
height of 1 crate in inch = 3*12
= 36 feet
Hence, the height of stack of shipping crates is 36 feet.