Solving a Physics Magnification Problem with a 6cm Focal Length Magnifier

[disk256]

1. The fine print in a contract that you want to read is 1 mm tall. You have a magnifier with a focal length of 6 cm. Where must you hold the magnifier so that the image appears to be 1 cm tall. Where is the image located



2. m= -di/do



3. using the equation given above i tried to use the equation hi/ho= di/do but no value for dO is given which means i can't use the equation


help would be appericiated

 

[rl.bhat]

Using this equation hi/ho= di/do find di in terms of do. ho and hi. Use the formula which related the f, do and di to get the required answer.