Question

KAKURO
NOTE: The objective is to fill all empty squares
using digits 1 to 9 Do that sum oeach horizontal
block equals the clue on its left, & the sum of
each verticalblock equals the clue on its top in
addition, No digit may be used in the same
block more than once
13
13
11
12
12
14
18
5​

Answer 1

Answer:

Object distance (u) = - 30 cm

Focal length (v) = - 30 cm

Let the image distance from the lens be v.

Formula to find image distance:

\frac{1}{v} -\frac{1}{u} =\frac{1}{f}

v

1

−

u

1

=

f

1

Plugging the values:

\frac{1}{v} + \frac{1}{30} =-\frac{1}{30}

v

1

+

30

1

=−

30

1

\frac{1}{v} = -\frac{1}{30}- \frac{1}{30}

v

1

=−

30

1

−

30

1

\frac{1}{v} = -\frac{1}{15}

v

1

=−

15

1

v = - 15 cm

The image will be formed on the same side where the object is kept at a distance of 15 cm.

Answer 2

Answer:

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