If the angles of a triangle are in the ratio 2:3:4 then the difference between the greatest and the greatest and the smallest angle is (a) 10° (b) 20° (c) 30° (d) 40°
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may be answer D is correct
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2x + 3x + 4x = 180
9x = 180
x = 20
2x = 40
3x = 60
4x = 80
=> difference between largest and smallest =
= 4x - 2x
= 80 - 40
=> 40
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