R of concave mirror = 30cm
u = -30
v = ?
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Answer:
v=-90cm
Explanation:
u=−30cm and magnification m=(−v/u)=−3 so v=(3u)
image is real so m should be negative v should be negative so v=−90cm
putting the above values of v and u in the Mirror equation,
1/f = 1/u + 1/v
we get focal length f=−22.5cm and image position v=−90cm
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