Q.26. The shadow of the tower becomes 60 meters longer when the altitude of the sun changes from 450 to 300 .Then the height of the tower is
(A) 20(√3+1)m
(B) 24 (√3+1) m
(C) 30 (√3+1)m
(D) 30 (√3-1) m
Q.27. A vertical post 15 ft. high is broken at a certain height and its upper part, not completely separated meets the ground angle of 300. Find the height at which the post is broken
(A) 10 ft
(B) 5 ft
(C) 15√3(2-√3) ft
(D) 5√3 ft
Q.28. The shadow of a tower is √3 times its height. Then the angle of elevation of the top of the tower is
(A) 450
(B) 300
(C) 600
(D) 900
Q.29. A man 6ft tall cats a shadow 4ft long. At the same time when a flag pole casts a shadow 50 ft long. The height of the flag pole is
(A) 80 ft
(B) 75 ft
(C) 60 ft
(D) 70 ft
Q.30. The angle of elevation of an aeroplane from a point on the ground is 600. After 15 seconds flight, the elevation changes to 300, If the aeroplane is flying at a height of 1500√3 m, find the speed of the plane
(A) 300 m/sec
(B) 200 m/sec
(C) 100 m/sec
(D) 150 m/sec
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