Given:
The power of the lens is,

The refractive index of the lens is,

The radius of curvature of the convex surface is,

To find:
The radius of curvature of the other surface
Explanation:
If the radius of curvature of the other surface is

we can write,

Now, substituting the values we get,

Hence, the radius of curvature of the other surface is 40 cm.
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The distance is the total distance she walked which is 16 meters adding the 6 meters to the corner and 10 meters to her friend's apartment. Her displacement is the distance from her original starting point so you set up a triangle with side lengths of 6 and 10 and solve for the hypotenuse which gives you a displacement of 11.66 meters.
The answer would be permeable i know this because i just took the test on apex.