Sachin being tested for his eyesight by an optician, sits 3 m in front of the mirror and looks at the image of the chart of letters, which seems to be 7 m in front of him. Where exactly is the chart of letters located?
A 1 m behind him
B 4 m behind him
C 3 m behind him
D 7 m behind him
HOW
Ans 1:
Class : Class 9
Please draw the diagram first. You will find the answer. When the image is 7 m infront of him, means the image is at 4m from the mirror on its back and the thus the object will be at the 4 m infront of the mirror, which is 1 m behind him.
Ans 2:
Class : Class 8
The distance of the image in the mirror s the same as it is in reality.So Sachin is sitting 3 meters away from the mirror and the image is forming 7 meters away from the mirror . Then 3 meters 4 meters= 7 meters and the image will be formed 14 meters away from the object.
Ans 5:
Class : Class 7
he is sitting 3cm in FRONT of the mirror. the letters appear 7M IN FRONT of him. now, 7-3=4. so if the distance BETWEEN MIRROR AND IMAGE is 4m. this means that the distance BETWEEN AND REAL OBJECT is also 4m. Sachin is sitting 3cm in front of the mirror, so 4-3=1m. thus the answer is a