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A Learning Portal from Recruitment India

A.

450 m

B.

500 m

C.

423.5 m

D.

495 m

Answer with explanation

Answer: Option BExplanation

Tan θ = Perpendicular / Base

Angle with treetop & Mall top is same

Tanθ = Height of tree / Distance of tree from guddi

=> Tanθ = 10/20

=> Tanθ = 1/2

Tanθ = Height of Mall / Distance of Mall from guddi

=> 1/2 = Height of Mall / 1000

=> Height of Mall = 500 m

Mall is 500 m Tall

Workspace

A man on the top of a vertical observation tower observes a car moving at a uniform speed coming directly towards it. If it takes 12 minutes for the angle of depression to change from 30° to 45°, how soon after this will the car reach the observation tower ?

A.

14 min. 35 sec.

B.

16 min. 23 sec.

C.

15 min. 49 sec.

D.

18 min. 5 sec.

Answer with explanation

Answer: Option BExplanation

Workspace

A boy is standing at the top of the tower and another boy is at the ground at some distance from the foot of the tower, then the angle of elevation and depression between the boys when both look at a each other will be

A.

Equal

B.

Angle of elevation will be greater

C.

Angle of depression will be greater

D.

Cannot be predicted for relation

Answer with explanation

Answer: Option AExplanation

Workspace

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