# At what distance from a simple microscope must an object be placed so that...

Question 486
A
2cm
B
3.3cm
C
4cm
D
5cm
E
15cm
##### Explanation
M=$$\frac {v}{u}=5\Rightarrow v=5u=20,let u be x\\ v=5x if v=20 then 5x=20 therefore x=20/5=4\,u=4cm$$

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