What angle does Bani make at the point where Teenu is standing while Joy Dev and Teenu are in the sa...........

Logical Reasoning(Master ) Direction Sense

Five friends Teenu, Bani, Chandni, Dev and Joy are playing Hide and Seek and standing randomly. Bani is to the northeast of Joy. Dev is 20 m to the east of Joy, who is 60 m to the west of Teenu. Chandni is to the northwest of Dev and in the line of Joy and Bani. Dev is 40 m to the south of Bani.

What angle does Bani make at the point where Teenu is standing while Joy, Dev and Teenu are in the same line?

135°

45°

90°

60°

None of these

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Explanation:

As per the diagram, the distance between Dev and Bani is 40 m while the distance between Dev and Teenu is also 40 m. Clearly, if we connect the points Bani, Dev and Teenu, they will form an isosceles triangle with angle BDT (Bani,Dev,Teenu) to be 90°.
Therefore, the angle BTD(Bani,Teenu,Dev) must be 45°.