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Question

Angles of a triangle are (x+10),(x+40) and (2x30). Find the value of x.


A

30

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B

40

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C

20

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D

10

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Solution

The correct option is B

40


Given that the angles of the triangle are (x+10), (x+40) and 2x30.

By Angle sum property,
Sum of the angles of a triangle =180
(x+10)+(x+40)+(2x30)=180
4x+5030=180
4x=160
x=40


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