CBSE Class 10 Answered
Yes, pritam you can equate the two formulae as they both denote one and the same thing.
Its just like equating 1= 1.
h = 5 cm
f = -10 cm
u = -15 cm
1/v + 1/u = 1/f
therefore, 1/v = 1/f - 1/u
= 1/(-10) - 1/(-15)
thus, v = +30 cm
Now, h'/h = -v/u
Therefore, h' = h x (-v/u)
= (5) x (-30/-15)
= 10 cm.
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