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UNIT-12
Geometrical Optics
12.9
An object 10cm high is placed at a distance of 20cm from a concave lens of focal

By Amara

UNIT-12
Geometrical Optics
12.9
An object 10cm high is placed at a distance of 20cm from a concave lens of focal length 15 cm

About the author
Amara

4. When
[tex] {2}^{31} [/tex]
is divided by 5 the
remainder is
(1) 4
(2) 3
(3) 2
(4) 1​

Two numbers are in the ratio 2 ratio 3. The difference of their cubes is 9,728. Find the numbers.​

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