Question

please help me out with this. ​

Answer 1

Answer:

40cm

Explanation:

we are given, that the image is double the size of object => this means, magnification is +2.

now,

        u = -20 cm    (given)

        we need to find v for 2x sized image...

from magnification formula...

-v/u = m

2 = -v/(-20)

v = 40 cm

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Answer 2

Answer:

qw134y98431256896214 2599533