Question

Please help ASAP! Best answer to be marked brainliest​

Answer 1

Answer:

15 cm

Explanation:

mirror formula

Answer 2

Answer:

f (focal length) = 30cm is the answer.

Explanation:

Given, In case of the convex mirror,,,

u (object distance) = -30cm. (left side of the mirror).

v (image distance) = 10cm.

BY MIRROR FORMULA,,,

1/v + 1/u = 1/f.

; 1/10 +[(-1/30)] = 1/f

; 1/10 - 1/30 = 1/f.

; 2 - 1 /30 = 1/f.

; 1/30 = 1/f

Now, reciprocal the fraction..

; 30cm = f (focal length).

Hope its will be helpful