Question

When seen through a 5x magnifying glass, a small leaf appears to
have an area of 25mm2
. What is the actual area of the leaf?
(a) 5mm2
(b)10mm2
(c) 1mm2
(d) 0.5 mm2

Answer 1

Answer:

(c) 1 mm²

Explanation:

Magnified area=25 mm²

                         = 5mm × 5mm

As the magnification of lens is 5x so the length and breadth both are magnified by 5 times

Actual area = 5mm × 5mm

                             5×5

Actual area = 1mm²

Hope it helps you!!!!!!!!!

Answer 2

Given: When seen through a 5x magnifying glass, a small leaf appears to

            have an area of 25mm2.

To find  The actual area of the leaf.

Solution: Magnified area=25 mm²

                                             = 5mm × 5mm

As the magnification of the lens is 5x so the length and breadth both                   are magnified by 5 times

Actual area = 5mm × 5mm / 5 x 5

Actual area = 1mm² .

Hence Actual area of the leaf is 1mm2 (C)