The angles of a quadrilateral are in the ratio 3:4:5:6. The largest angle of the quadrilateral is:

80°

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100°

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120°

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140°

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Solution

The correct option is C 120°
We know that,
Sum of all angles in a quadrilateral is 360°.

Now,
$3 x + 4 x + 5 x + 6 x = 360 °$
$18 x = 360 °$
$x = 20 °$

Therefore, $x = 20 °$
Hence, Largest angle = $6 \times 20 ° = 120 °$

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