Question

1 point
Q.20.(A) A man is standing at a
position X in front of a plane mirror, a
distance of Y metre from the mirror
as shown in the figure. i) When he
moves 5 m away from the mirror, the
new distance between the man and his
image becomes 20 metre. What is the
value of Y? *
5 m
(metre)
5 m
10 m
20 m
40 m​

Answer 1

Answer:

10 m

Explanation:

as image is formed at equal distance behind the mirror. so when he moves 5 m away the image also moves 5m away so 5+5=10 so new distance - new covered distance = original (old) distance

so, 20 - 10 = 10 m