# User Forum

Subject :NSO    Class : Class 6

Sachin being tested for his eyesight by an optician, sits 3 m in front of a plane mirror and looks at the image of the chart of letters, which seems to be 7m in front of him. Where exactly is the chart of letters located?

A1 m behind him
B4 m behind him
C3 m behind him
D7 m behind him

how

Class : Class 9
A

Class : Class 3
A

Class : Class 7

Class : Class 7

## Ans 5:

Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, letâs read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m â 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m â 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

## Ans 6:

Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, letâs read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m â 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m â 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

Class : Class 1
A

## Ans 8:

Class : Class 7
A as image is as far behind the mirror as Object is in front of it. In this case Sachin is 3 m in front of the mirror and the object seems to be seven meters ahead. As Sachin is 3 m in front of the mirror that means object is (7-3) = 4 m behind the mirror. As image is as far behind the mirror as Object is in front of it, It means chart is 4 meters in front of the mirror. ( 4 - 3 ) = 1 m behind Sachin as Sachin is also in front of the mirror. Hope that answers your question !

Class : Class 1

Class : Class 9

Class : Class 8

Class : Class 7
a