Question

20 psi (pounds per square inch) equals about how many kPa (kilopascals)?

A. 138
B. 140
C. 20
D.50
O​

Answer 1

Answer: Option A

138 kPa

Explanation:

By definition 1 psi (Pound per square inch) is equal to 6.895 Kpa (kilopascals).

So we use this relationship as a conversion factor:

`(6.895\ kPa)/(1\ psi)`

So to know how many kPa represent 20 psi we must multiply 20 psi by the conversion factor

`20\ psi\ *\ (6.895\ kPa)/(1\ psi)=137.895\ kPa`

If we round to the nearest integer we get: 137.895 kPa ≈ 138 kPa

The answer is the option A