Question

the distance of an object from concave mirror of focal length 10cm so that the image is 4 times. the size of the object is ______(multiple choice questions). a)12.5cm. b)10cm. c)7.5cm. d)15cm​

Answer 1

option b. 10 cm is correct

Answer 2

Answer:

watch the attachment

Explanation:

i have used other formula which is also right