Question

If an object is moved by 7.5cm/s, what will be distance between object and it's mirror image after 4 seconds?​

Answer 1

Answer:

the distance between object and the image will be 60 cm.

Explanation:

Because the distance of object to the mirror is equal to the distance between image and mirror. therefore, if we want to find out the distance between image and the obect then we have to double the distance of object to the mirror.

distance of object to the mirror =7.5*4 = 30

therefore, distance of object and mirror image is

30*2=60

Answer 2

Answer:

60cm

Explanation:

dist =speed ×time

so,7.5×4=30cm

now in plane mirror image is formed at the dist at which object is placed in front of it so dist gets double =60