Question

# In a Parallelogram the diagonals intersect at O. If then AC is

- 90
- 75
- 105
- 42

## The correct answer is: 42

### To find AC

we know in a parallelogram diagonals bisect each other.

OA=OC

2x+15=10x-9

8x=24

x=3

...........

AC=OA+OC

=21+21

=42

(Alternatively->AC=2AO=2×21=42)

Hence option 4 is correct

### Related Questions to study

### ABCD is a Parallelogram. If

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