CTET Solved Paper MCQ - UPTET Feburary 2016
PART IV
Mathematics
109
The supplementary angle of an angle is three times of its complementary angle, then the angle is
Let the required angle be x.
Then, (180° - x) = 3 x (90° - x)
180° - x = 270° - 3x
2x = 90°
x = 45°
Then, (180° - x) = 3 x (90° - x)
180° - x = 270° - 3x
2x = 90°
x = 45°
Required area = [45 + (2 x 2.5)] x [30 + (2 x 2.5)]- 45 x 30
= [45 + 5] x [30 + 5] - 1350
= 50 x 35 - 1350
= 1750 - 1350
= 400m2.
= [45 + 5] x [30 + 5] - 1350
= 50 x 35 - 1350
= 1750 - 1350
= 400m2.

