Answer
The image distance (i) = +30 cm.
Work Step by Step
The image distance is given by:
$1/f = 1/p +1/i$
Solving for i, we obtain:
$i = pf/(p-f)$
By substituting p = +60 cm and f = +20 cm, we obtain:
$i = (60)(20)/(60-20)\\\\
i = +30 cm$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.