Calculating Pressure Increase from Ice Expansion in an Engine Block

[zaqwer]

Homework Statement

When water freezes, it expands about 9.10%. What would be the pressure increase inside your automobile engine block if the water in it froze? The bulk modulus of ice is 2.00 multiplied by 10^9 N/m2.

Homework Equations

Delta P=-B*(Delta V)/V

The Attempt at a Solution

Delta P= 2*10^9*.091
= 1.82*10^8 Pa

It says that the answer is within 10% of the correct answer however I don't know if there is a small error that is causing me to be slightly off.

 

[Mapes]

1.00 is not 9.10% less than 1.0910. Know what I mean?

EDIT: By the way, welcome to PF!