# interra systems Interview Questions

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###### The elevation of T, from A is xº where tan xº = 2/5 and AF = 200 m. The elevation of T from B, where AB = 80 m is yº. Calculate : (a)the height of the tower TF, (b)the angle ’y’ correct to nearest deg A. 60 m, 36º B. 100 m, 31º C. 80 m, 34º D. 40 m, 39º
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###### The equation of a straight line passing through (1, 2) and perpendicular to the line 3x + 4y = 7 is A. 3x + 4y = 7 B. 4x – 3y + 2 = 0 C. 4x – 3y + 7 = 0 D. None of these
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###### Simplify (x – 9)(x + 10) ⁄ (x² – 81) A. (x + 10) ⁄ (x - 9) B. (x + 10) ⁄ (x + 9) C. (x² + x - 90) ⁄ (x² - 81) D. None of above
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###### The angle of elevation of the top of the tower from a point on the ground is sin−1⁡(35). If the point of observation is 20 meters away from the foot of the tower, what is the height of the tower? A. 138.4 B. 128.4 C. 118.4 D. 108.4
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###### In a 500 m race , the ratio of the speeds of two contestants A and B is 3 : 4 A has a start of 140 m. Then , A wins by : A. 10 m B. 20 m C. 30 m D. 40 m
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