Question

a shaving mirror has a radius of curvature of 30 cm if man sees his face 2.5 times the size of his face how far is the mirror from the face​

Answer 1

Answer:

f=-15

m=2.5

1/f=1/v+1/u

-v=2.5u

-1/15=1/2.5-2.5/2.5u

by criss multuplying,

u=9cm

Answer 2

Answer:

80 cm

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Step-by-step explanation: