Suggested Answer
The image will be formed at a distance of 30 cm in its front. Hence, this is the required solution.Given that,Object distance, u = -15 cmThe radius of curvature of the concave mirror, R = 20 cmFocal length, f = R/2 = -10 cm (negative for concave mirror)Let v is the distance between mirror and the formed image. Using mirror's formula to find it as :[tex]$\frac{1}{u}+\frac{1}{v}=\frac{1}{f}$[/tex][tex]$\frac{1}{v}=\frac{1}{f}-\frac{1}{u}$[/tex][tex]$\frac{1}{v}=\frac{1}{(-10)}-\frac{1}{(-15)}$[/tex][tex]$v=-30 \mathrm{~cm}$[/tex]So, the image will be formed at a distance of 30 cm in its front. Hence, this is the required solution.To learn more about concave mirror visit:https://brainly.com/question/3555871#SPJ9
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