Prevent Windshield Breakage: Minimizing Temperature Tolerance in mm

[tdusffx]

An automobile windshield has dimensions of 60 cm by 150 cm. What minimum tolerance in mm is needed to prevent the windshield from breaking if the temperature changes by 200°F? (The linear expansion coefficient of glass is 9×10-6 (oC)-1.)

I thought of using the area expansion formula but when the problems asked for the 'minimum tolerance in mm' then I have no idea...

A = yL*(tf-ti)

y = 2*9x10^-6

I don't know what to do after this

 

[EnumaElish]

You should think about moving this to homework.

My understanding of the expression "min. tolerance in mm" is the width of the margin between the glass and the frame that is necessary to prevent the glass forcing against the frame due to expansion.